42-5u=u

Solution for 42-5u=u equation:

Simplifying
42 + -5u = u

Solving
42 + -5u = u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '-1u' to each side of the equation.
42 + -5u + -1u = u + -1u

Combine like terms: -5u + -1u = -6u
42 + -6u = u + -1u

Combine like terms: u + -1u = 0
42 + -6u = 0

Add '-42' to each side of the equation.
42 + -42 + -6u = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -6u = 0 + -42
-6u = 0 + -42

Combine like terms: 0 + -42 = -42
-6u = -42

Divide each side by '-6'.
u = 7

Simplifying
u = 7