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Writing Expressions

November30

Write an expression for the sequence of operations:

  • Add 3 to x, subtract the result from 1, then double what you have.
  • Add 3 to x, double what you have, then subtract 1 from the result.

HINT: Parenthesis force you to do operations before other operations!

by posted under Math 7, Math 7/8, maths | 110 Comments »    
110 Comments to

“Writing Expressions”

  1. December 1st, 2014 at 8:31 am      Reply jimenai2014 Says:

    2[1-(x+3)]
    [1-(x+3)]2


  2. December 1st, 2014 at 8:37 am      Reply lizbethv2014 Says:

    1. 2[1-(x+3)] 2. [2(x+3)]-1


  3. December 1st, 2014 at 8:40 am      Reply ally Says:

    1. 2[1-[x+3]

    2. [2*[x+3]-1]

    ———————————————————————————————–


  4. December 1st, 2014 at 8:40 am      Reply logany2014 Says:

    2[1-(x+3)] 1-[2(3+x)]


  5. December 1st, 2014 at 1:53 pm      Reply keltons2014 Says:

    1-(3+x)*2=blank


  6. December 1st, 2014 at 1:54 pm      Reply jadalynnv2014 Says:

    1(3+x)*2


  7. December 1st, 2014 at 2:50 pm      Reply sydneyb2014 Says:

    * (3+x-1)2
    * 2(3+x) -1


  8. December 1st, 2014 at 3:28 pm      Reply mateoh2014 Says:

    1+x
    5+x


  9. December 1st, 2014 at 5:35 pm      Reply emmabr2014 Says:

    so the problem says add 3 to x double what you have then subtract 1 from the result. so
    3+x
    double 3 and you get 6
    plug 6 in for x
    6-1=5
    so 3+5=8
    eight is the answer 🙂


  10. December 1st, 2014 at 6:13 pm      Reply allysonb2014 Says:

    1.(3+x)-1 *2
    2. 3+x(2) -1

    * = multiply


  11. December 1st, 2014 at 7:54 pm      Reply rachelre2014 Says:

    what i did was i went word by word so this is how the first equation came out 3+x=-1*2
    this is how the second equation came out (3+x)the power of 2-1 that is how my equations turned out


  12. December 2nd, 2014 at 8:16 am      Reply Natalia M :3 Says:

    2[1-(X-3)]

    1[2(x+3)]


  13. December 2nd, 2014 at 8:29 am      Reply anasm2014 Says:

    2[1-(x-3)]
    1-[2(x+3)]
    and thats the equations


  14. December 2nd, 2014 at 8:30 am      Reply marial2014 Says:

    1.2[1-(x+3)]

    2.[2x(x+3)]-1


  15. December 2nd, 2014 at 11:56 am      Reply alexsisb2014 Says:

    This is the real answer.
    (3+x)-1*2
    (3+x)*2-1


  16. December 2nd, 2014 at 3:02 pm      Reply brandonm😄 Says:

    3+x=4,4-1=3•2=6 3+x=4×2=8,8-1=7


  17. December 2nd, 2014 at 5:30 pm      Reply citlallym2014 Says:

    The first operations would be (3+x-1)(2) because the order of operations makes you do parenthesis first then multiplication and last the subtraction.
    The second sequence would be written (3+x)(2)-1 because this order tells you to first subtract then multiply and last subtract.
    To check my work i used P.E.M/D.A/S and plugged in 5 for x on both equations and got 14 for the first and 15 for the second which shos that the answer changes if you change the order.


  18. December 2nd, 2014 at 7:02 pm      Reply madisono2014 Says:

    my first one is (3+x-1)x2
    my second one is (3+x*2)-1


  19. December 2nd, 2014 at 7:28 pm      Reply danield2014 Says:

    1) (1-(3+x)).2
    2) ((3+x)(2))-1


  20. December 2nd, 2014 at 7:48 pm      Reply jadynz2014 Says:

    1. 1-(x+3)
    2. (x+3)2-1


  21. December 3rd, 2014 at 11:30 am      Reply lissethf2014 Says:

    1. 2[1-(x+3)]
    2. [2*(x+3)]-1


  22. December 3rd, 2014 at 1:07 pm      Reply alesham2014 Says:

    when you add 3 then subtract 1 then doubel it you get 4 as your answer what im trying to say is if you add 3 to x then subtract 1 then doubel it you will get 4 as your answer


  23. December 3rd, 2014 at 1:51 pm      Reply treya2014 Says:

    (3+x)- 1 x 2
    (3+x) x 2 – 1


    • December 9th, 2014 at 11:24 am      Reply ajellison Says:

      If you want a certain operation to come before another operation you need to put () around it to tell it to come first!


  24. December 3rd, 2014 at 3:44 pm      Reply Tristin2014 Says:

    1. (3 + x) – 1 x 2 =

    2. (3 + x) 2 – 1 =


    • December 9th, 2014 at 11:23 am      Reply ajellison Says:

      If you want a certain operation to come before another operation you need to put () around it to tell it to come first!


  25. December 3rd, 2014 at 8:03 pm      Reply kateenaa2014 Says:

    The first expression is (3+x-1)•2.
    The second expression is (3+x)•2-1


  26. December 3rd, 2014 at 8:48 pm      Reply jaylicev2014 Says:

    1) (3+x)-1×2

    2) (3+x)x2-1


  27. December 4th, 2014 at 11:15 am      Reply dustinr2014 Says:

    [1-(3+x)] x2


  28. December 4th, 2014 at 11:50 am      Reply cameronj2014 Says:

    3+x-1
    1-3=-2


  29. December 4th, 2014 at 2:50 pm      Reply Susy Torres Says:

    1. The expression would be 3+x-1(2) because you have to add 3+x and then subtract 1 and lastly multiply it by 2 and when there is parenthesis it can also mean multiplication.

    2. The expression would be 3+x(2)-1 because now you have to add 3+x just like in the other expression but multiply the answer you get by 2 and whatever that equals you have to subtract it from 1.


  30. December 4th, 2014 at 3:00 pm      Reply kalebv2014 Says:

    what my result was that I had gotten 6.


  31. December 4th, 2014 at 3:00 pm      Reply seans2014 Says:

    add 3 to x
    doulble 3 would be 6
    then you subtract 1 from 6
    THEN YOUR AWNSER IS 5


  32. December 4th, 2014 at 3:01 pm      Reply turiea2014 Says:

    (x+3)-1=?


  33. December 4th, 2014 at 3:02 pm      Reply benjamind2014 Says:

    2 (3+x) -1


  34. December 4th, 2014 at 3:05 pm      Reply jaydinw2014 Says:

    3+x=4


  35. December 4th, 2014 at 3:27 pm      Reply makaylag2014 Says:

    (3+x-1)*2
    ( 3+x) *2)-1
    reason being is that you want to add first so you want to add parentheses in order to do it first. 😛


  36. December 4th, 2014 at 3:42 pm      Reply Lisbeth fernando Says:

    the expression for this sequence and operations is (3x-1)then(3xand3x-1) that is what I think ok.:)


  37. December 4th, 2014 at 3:46 pm      Reply haileyb2014 Says:

    1-(3+x)2

    (3+x)2-1


  38. December 4th, 2014 at 3:54 pm      Reply chasen2014 Says:

    1. x+3-1=2. 2 doubled is 4
    2. x+3=x+6-1=5


  39. December 4th, 2014 at 4:30 pm      Reply Katiesa2014 Says:

    1. (3+x -1)2
    2. (3+x)(2) -1


  40. December 4th, 2014 at 4:43 pm      Reply Anonymous Says:

    The first one is (3+x -1)2
    And the second one is…
    (3+x)(2) -1


  41. December 4th, 2014 at 4:47 pm      Reply brandonw2014 Says:

    the first equation would be 1-(3+x) x 2

    The second equation would be 2(3+x)-1


  42. December 4th, 2014 at 4:47 pm      Reply angeli2014 Says:

    The first one is (3+x -1)2
    And
    The second one is (3+x)(2)1


    • December 9th, 2014 at 11:22 am      Reply ajellison Says:

      If you have a number next to () without an operation symbol it means you are multiplying. Did you mean to multiply by 2 and 1?


  43. December 4th, 2014 at 5:04 pm      Reply haleya2014 Says:

    (x+3-1)x2


  44. December 4th, 2014 at 5:05 pm      Reply haleya2014 Says:

    (x+3-1)x2 is the expression


  45. December 4th, 2014 at 5:20 pm      Reply walterm2014 Says:

    x=2
    [(3+2)-1] x 2
    5(2)
    10=10

    x=4
    [(3+4)x 2]- 1
    14-1
    13


  46. December 4th, 2014 at 5:51 pm      Reply colev2014 Says:

    1. 3x-(1×2)

    2.3x(x2-1)


  47. December 4th, 2014 at 5:54 pm      Reply jiannav2014 Says:

    2(x+3-1)
    2(3+x)-1


  48. December 4th, 2014 at 5:54 pm      Reply Jason Bietz Says:

    5


  49. December 4th, 2014 at 6:02 pm      Reply julianm2014 Says:

    2(1-(3+x))


  50. December 4th, 2014 at 6:12 pm      Reply jaquelinev2014 Says:

    1)( 3+x)-1)•2
    2)(3+x)•2)-1


  51. December 4th, 2014 at 6:18 pm      Reply kevina2014 Says:

    The first one would be 2(-1(3+x) because first we would have multiplication so it would be the 2 then we would put the -1 next to it with parenthesis then in parenthesis you would also put adding the 3 and x. For the second one it would be 2(x+30(-1). I but the two first because multiplication comes first then I put the 3 + x because subtracting is at the end.


    • December 9th, 2014 at 11:11 am      Reply ajellison Says:

      If you have an number that is in front of () without an operation sign between them, it means multiply. Did you mean to multiply by -1?


  52. December 4th, 2014 at 6:21 pm      Reply josiasp2014 Says:

    sorry made a little error, here is the correct one

    expression one. (x+3-1)2

    expression two. (3+x)2-1


  53. December 4th, 2014 at 7:41 pm      Reply samanthabo2014 Says:

    2(1-(3+x))

    2(3+x)-1


  54. December 4th, 2014 at 8:56 pm      Reply kaedenh2014 Says:

    1) 2[1-(x+3)]
    2) 2(X+3)-1


  55. December 5th, 2014 at 5:23 pm      Reply michelleca2014 Says:

    1) 2{1-(x+3)}
    2) {2(x+3)} -1


  56. December 5th, 2014 at 5:50 pm      Reply bernicek2014 Says:

    1) (3+x-1)2

    2) (3+x)(2)-1


  57. December 5th, 2014 at 5:54 pm      Reply katarinam2014 Says:

    (1-(3+x))x2
    (3+x)x2-1


  58. December 5th, 2014 at 5:55 pm      Reply graciea2014 Says:

    1.2[1-(3+x)]
    How I got my answer was sense I had to double my answer, I multiplied it by two. I put up brackets then subtracted 3+x.
    2.[2(3+x)]-1
    I put brackets around 2 times 3+x. Then sense I have to subtract 1 from my result I put -1 at the end of my expression.


  59. December 5th, 2014 at 6:28 pm      Reply ericv2014 Says:

    (3+x)-1=x (5+x)-1=x


  60. December 6th, 2014 at 1:43 pm      Reply teah2014 Says:

    3(x)-1•2
    3(c)•2-1
    I think it’s like that.


  61. December 6th, 2014 at 3:59 pm      Reply jasminb2014 Says:

    1. 1-3+x
    2.(3+x)x2-1


  62. December 6th, 2014 at 5:32 pm      Reply maleal2014 Says:

    1.) 2(1-(x+3)) 2.) 2(x+3)-1


  63. December 6th, 2014 at 10:11 pm      Reply julianac2014 Says:

    1) ((3+x)-1)*2

    2) (3+x)*2-1

    —————————————————————————-
    1) First, I put parenthesis around 3+x to show that you need to add 3 and x before anything else. Then, I had to subtract 1 from the result of that before doubling anything, so I did ((3+x)-1 to show it. Finally, I put times 2 to double it.

    2) First I put parenthesis around 3+x to show that you need to do that before anything else. Then I put *2 to show that you need to double that. I did not put parenthesis around that and 3+x because you still need to follow the order of operations, so I did -1 after *2.


  64. December 7th, 2014 at 6:44 pm      Reply rheond2014 Says:

    Equation 1: 3+x= x+3-1= x+2*2= x+4

    Equation 2: 3+x=x+3*2= x+6


  65. December 7th, 2014 at 7:31 pm      Reply maisyd2014 Says:

    (3+x-1)to the second power=blank
    (3+x)to the second power-1=blank


  66. December 8th, 2014 at 7:42 am      Reply alexanderz2014 Says:

    (3+x-1)*2
    (3+X)*2=y-1


  67. December 8th, 2014 at 8:09 pm      Reply rogeliop2014 Says:

    x+3=


  68. December 9th, 2014 at 11:57 am      Reply jeanettem2014 Says:

    3+x-1*2

    3+x*2-1


  69. December 9th, 2014 at 3:10 pm      Reply reneeh2014 Says:

    The first expression is (3+x-1)•2.
    The second expression is (3+x)•2-1


  70. December 9th, 2014 at 4:28 pm      Reply teresam2014 Says:

    1.2[(3+x)-1]
    2.[(3+x)*2]-1


  71. December 9th, 2014 at 4:32 pm      Reply alexaz2014 Says:

    1-(3+x)2

    (3+x)2-1
    That is the answer💩


  72. December 9th, 2014 at 6:18 pm      Reply fanel2014 Says:

    1.) (3+x)-(1×2)
    2.) 2(3+x)-1


  73. December 10th, 2014 at 11:13 am      Reply landonc2014 Says:

    (3+x)-1×2
    (3+x)x2-1


  74. December 10th, 2014 at 11:14 am      Reply landonc2014 Says:

    (3+x)-1×2
    (3+x)x2-1 🙂


  75. December 10th, 2014 at 6:58 pm      Reply salotep2014 Says:

    (3+x-1)*2. (3+x)*2=y-1


  76. December 11th, 2014 at 10:37 am      Reply anastias2014 Says:

    3+x-1
    1-3=-2


  77. December 11th, 2014 at 1:33 pm      Reply saulr2014 Says:

    i think my answer for the green one is first gonna be [3+x]-1×2
    and for my red answer is gonna be [3+x]+3-1


  78. December 11th, 2014 at 1:33 pm      Reply saulr2014 Says:

    i think my answer for the green one is first gonna be [3+x]-1×2
    and for my red answer is gonna be [3+x]+3-1


  79. December 11th, 2014 at 1:33 pm      Reply saulr2014 Says:

    i think my answer for the green one is first gonna be [3+x]-1×2
    and for my red answer is gonna be [3+x]+3-1


  80. December 13th, 2014 at 2:22 pm      Reply kaiw2014 Says:

    2[(3+x)-1]

    2(3+x)-1


  81. December 14th, 2014 at 9:07 am      Reply alyssaj2014 Says:

    1) (3+x)-1.2
    2) 3+x(2)-1
    .=multiplie


  82. December 16th, 2014 at 7:05 pm      Reply harrisonw2014 Says:

    [(3+x)-1]*2

    [(3+x)2]-1


  83. December 16th, 2014 at 8:30 pm      Reply Mason.M Says:

    1) (3+x)-1×2

    2) (3+x)x2-1


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