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20-04-2020
Mathematics

contestada

4x + 5x + 12 = -6 (given)
9x + 12 = -6 (simplify)
9x = -18 (subtraction)
x = -2 (addition)
Which reason is incorrect?

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nuggetbutt nuggetbutt

20-04-2020

The last one is division, not addition.
They’re dividing both sides by 9.

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