Respuesta :

3(x-9)=-39

3x-27=-39
    +27  +27
3x=-12
/3   /3

x=-4
The answer is x= -4

3(x-9)= -39
divide both sides by 3 
x-9= -13
add 9 to both sides
x= -4

3(-4-9)= -39
-12-27= -39