42-2u=4u

Solution for 42-2u=4u equation:

Simplifying
42 + -2u = 4u

Solving
42 + -2u = 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
42 + -2u + -4u = 4u + -4u

Combine like terms: -2u + -4u = -6u
42 + -6u = 4u + -4u

Combine like terms: 4u + -4u = 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