Question

|3x|=9 what's the answer and the breakdown of this problem?

Answer 1

• |3x|=9 means that 3x=-9 or 3x=9 so x=3 and x=-3

Answer 2

$|3x|=9\iff3x=9\ \vee\ 3x=-9\qquad\text{divide both sides by 3}\\\\x=3\ \vee\ x=-3$