9u-27+(-12u)=0

Solution for 9u-27+(-12u)=0 equation:

Simplifying
9u + -27 + (-12u) = 0

Reorder the terms:
-27 + 9u + (-12u) = 0

Combine like terms: 9u + (-12u) = -3u
-27 + -3u = 0

Solving
-27 + -3u = 0

Solving for variable 'u'.

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

Add '27' to each side of the equation.
-27 + 27 + -3u = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -3u = 0 + 27
-3u = 0 + 27

Combine like terms: 0 + 27 = 27
-3u = 27

Divide each side by '-3'.
u = -9

Simplifying
u = -9