Question

3x+9=0 find the value of x

Answer 1

3x+9=0
3x=_9
x=_9/3
x=_3

Answer 2

hell
here is your answer ....

3x+9=0
3x=-9
x= -9/3
so
$\bold{\boxed{\boxed{\boxed{ x\:=\:-3}}}}$