Question

Need help ASAP!

Solve for x: |2x + 6| − 4 = 20

A. x = 9 and x = 11
B. x = −9 and x = 15
C. x = 9 and x = −15
D. No solution

Answer 1

Isolate the absolute value part by adding 4 on both sides

Answer 2

assume a>0
then use if |f(x)|=a
then f(x)=a or -(f(x))=a
for example
if you have |x-3|=5
then x-3=5 or -(x-3)=5
the you solve both equations

Answer 3

I deleted the answer there to give the asker a chance to show us there work and ask for suggestions on changes.