Question

Solve for x: |2x + 6| − 4 = 20

x = 9 and x = 11

x = −9 and x = 15

x = 9 and x = −15

No Solution

Answer 1

You need to solve two equations:

(2x + 6) - 4 = 20
2x + 2 = 20
2x = 18
x = 9

AND

-(2x + 6) - 4 = 20
-2x -6 - 4 = 20
-2x -10 = 20
-2x = 30
x = -15

Choice 3 is correct.

Answer 2

thanks i found it difficult