Question

|3x+9|= 30

Answer: x=7, -13

Answer 1

Answer:

$\boxed{x=7, \: x=-13}$

Step-by-step explanation:

$|3x+9|= 30$

Solve for absolute value.

There are two possibilities.

One possibility:

$3x+9=30\\3x=21\\x=7$

Second possibility:

$3x+9=-30\\3x=-39\\x=-13$