paytonlewellyn123 paytonlewellyn123
  • 04-08-2016
  • Mathematics
contestada

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

Respuesta :

Panoyin
Panoyin Panoyin
  • 04-08-2016
|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   
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