halledoll2002
28.08.2019 •
Mathematics
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
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Ответ:
|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
Ответ:
32-20=12
Step-by-step explanation: