Question

8x – 8 = 7x + 4
x = 12

How do they get 12?

Answer 1

By simplifying both sides of the equation then isolating the variable

Answer 2

8x-8=7x+4
-7x -7x

x-8=4
+8 +8

x= 12

you put the like variables together and then try to isolate the variable