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

9x + 12 = - 6 (simplify)

9x = - 18 (subtraction)

x = - 2 (addition)

Which reason is incorrect?

A) addition

Eliminate

B) given

C) simplify

D) subtraction

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Solve: 8x + 3 - 11x = - 9

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