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4 August, 17:28

What makes the open sentence 7x - 7 = 2x + 8 true

A. X = 0

B. X = 1

C. X = 3

D. X = 4

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Answers (2)
  1. 4 August, 19:09
    0
    If we plug x = 3 into the equation we have

    7 (3) - 7 = 14

    and

    2 (3) + 8 = 14

    So the answer is C
  2. 4 August, 20:39
    0
    7x - 7 = 2x + 8

    7x - 2x = 8 + 7

    5x = 15

    x = 3

    Answer

    C. X = 3
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