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9 September, 21:32

What is

7x+12=13x-21

+5
Answers (2)
  1. E
    9 September, 22:12
    0
    5 1/2 = x

    Step-by-step explanation:

    7x+12=13x-21

    Subtract 7x from each side

    7x+12 - 7x = 13x-7x-21

    12 = 6x-21

    Add 21 to each side

    12+21 = 6x-21+21

    33 = 6x

    Divide by 6

    33/6 = 6x/6

    11/2 = x

    Changing to a mixed number

    5 1/2 = x
  2. W
    9 September, 23:08
    0
    X=5.5

    7x + 12 = 13x - 21

    -12 - 12

    7x = 13x - 33

    -13x - 13x

    -6x = - 33

    Dived - 6 on both sides, the six cancels out and - 33 dived by - 6 is 5.5, it is a positive number because when diving two negative numbers it results in a positive number.
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