7x-7=13+12x
Subtract 12x from both sides of the equation.
7x-7-12x=13
Subtract 12x from 7x.
-5x-7=13
-5x-7=13
Add 7 to both sides of the equation.
-5x=13+7
Add 13 and 7.
-5x=20
-5x=20
Divide each term in -5x=20 by -5.
-5x-5=20-5
Cancel the common factor of -5.
Cancel the common factor.
-5x-5=20-5
Divide x by 1.
x=20-5
x=20-5
Divide 20 by -5.
x=-4
x=-4
Solve for x 7x-7=13+12x