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6 July, 21:05

4x + 5x + 12 = - 6 (given)

9x + 12 = - 6 (simplify)

9x = - 18 (subtraction)

x = - 2 (addition)

Which reason is incorrect?

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Answers (1)
  1. 6 July, 23:50
    0
    The last one is division, not addition.

    They're dividing both sides by 9.
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