Question

What is the solution set for |3x + 6| = 9

Answer 1

solve two equations
\[3x+6=9\] and
\[3x+6=-9\] separately. you will get two answers

Answer 2

\[|3(x+2)|=|3||x+2|=3|x+2|=9 => |x+2|=3 \]
\[=> x+2=3 \text{ or } x+2=-3 => x=1 \text{ or }x=-5 \]

Answer 3

thanks