-6-3u+9-(4u)=

Solution for -6-3u+9-(4u)= equation:

Simplifying
-6 + -3u + 9 + -1(4u) = 0

Remove parenthesis around (4u)
-6 + -3u + 9 + -1 * 4u = 0

Multiply -1 * 4
-6 + -3u + 9 + -4u = 0

Reorder the terms:
-6 + 9 + -3u + -4u = 0

Combine like terms: -6 + 9 = 3
3 + -3u + -4u = 0

Combine like terms: -3u + -4u = -7u
3 + -7u = 0

Solving
3 + -7u = 0

Solving for variable 'u'.

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

Add '-3' to each side of the equation.
3 + -3 + -7u = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -7u = 0 + -3
-7u = 0 + -3

Combine like terms: 0 + -3 = -3
-7u = -3

Divide each side by '-7'.
u = 0.4285714286

Simplifying
u = 0.4285714286