(3u+6)+u=

Solution for (3u+6)+u= equation:

Simplifying
(3u + 6) + u = 0

Reorder the terms:
(6 + 3u) + u = 0

Remove parenthesis around (6 + 3u)
6 + 3u + u = 0

Combine like terms: 3u + u = 4u
6 + 4u = 0

Solving
6 + 4u = 0

Solving for variable 'u'.

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

Add '-6' to each side of the equation.
6 + -6 + 4u = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 4u = 0 + -6
4u = 0 + -6

Combine like terms: 0 + -6 = -6
4u = -6

Divide each side by '4'.
u = -1.5

Simplifying
u = -1.5