u+42=7u

Solution for u+42=7u equation:

Simplifying
u + 42 = 7u

Reorder the terms:
42 + u = 7u

Solving
42 + u = 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
42 + u + -7u = 7u + -7u

Combine like terms: u + -7u = -6u
42 + -6u = 7u + -7u

Combine like terms: 7u + -7u = 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