-u+6=-3u

Solution for -u+6=-3u equation:

Simplifying
-1u + 6 = -3u

Reorder the terms:
6 + -1u = -3u

Solving
6 + -1u = -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
6 + -1u + 3u = -3u + 3u

Combine like terms: -1u + 3u = 2u
6 + 2u = -3u + 3u

Combine like terms: -3u + 3u = 0
6 + 2u = 0

Add '-6' to each side of the equation.
6 + -6 + 2u = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 2u = 0 + -6
2u = 0 + -6

Combine like terms: 0 + -6 = -6
2u = -6

Divide each side by '2'.
u = -3

Simplifying
u = -3