Solve for x: |3x + 12| = 18 A.x = 2, x = –10 B.x = 2, x = –2 C.x = 10, x = –10 D.x = –2, x = 10

asked Jul 28, 2017 97.1k views

5 votes

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

A.x = 2, x = –10
B.x = 2, x = –2
C.x = 10, x = –10
D.x = –2, x = 10

7.3k points

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2 votes

|3x + 12| = 18
|3x + 12| = ±18
3x + 12 = 18 or 3x + 12 = -18
- 12 - 12 - 12 - 12
3x = 6 3x = -30
3 3 3 3
x = 2 x = -10

8.7k points

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