Move all terms not containing u to the right side of the equation.
Add 8 to both sides of the equation.
Add 80 and 8.
Divide each term by 4 and simplify.
Divide each term in 4u=88 by 4.
Cancel the common factor of 4.
Cancel the common factor.
Divide u by 1.
Divide 88 by 4.
Solve for u 4u-8=80