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fgiga [73]
3 years ago
8

Solve for x: |3x + 12| = 18

Mathematics
1 answer:
pishuonlain [190]3 years ago
4 0

|3x+12|=18\iff3x+12=18\ \vee\ 3x+12=-18\\\\\text{Subtract 12 from both sides}\\\\3x=6\ \vee\ 3x=-30\qquad\text{divide both sides by 3}\\\\\boxed{x=2\ \vee\ x=-10}\to\boxed{A.}

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