Answer:
-9
Step-by-step explanation:
This is a find the x equation!
4(x+9)=x+9
First we'll multiple the 4 into the paranthatsis
4x+36 = x +9
then we'll group the Xs together on one side, and the normal nubers (make sure to make sure the signs are right when moving them across the = sign)
3x= -27
x = - 9
