-3(-3w+u)+3(6u+3w)=

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

Simplifying
-3(-3w + u) + 3(6u + 3w) = 0

Reorder the terms:
-3(u + -3w) + 3(6u + 3w) = 0
(u * -3 + -3w * -3) + 3(6u + 3w) = 0
(-3u + 9w) + 3(6u + 3w) = 0
-3u + 9w + (6u * 3 + 3w * 3) = 0
-3u + 9w + (18u + 9w) = 0

Reorder the terms:
-3u + 18u + 9w + 9w = 0

Combine like terms: -3u + 18u = 15u
15u + 9w + 9w = 0

Combine like terms: 9w + 9w = 18w
15u + 18w = 0

Solving
15u + 18w = 0

Solving for variable 'u'.

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

Add '-18w' to each side of the equation.
15u + 18w + -18w = 0 + -18w

Combine like terms: 18w + -18w = 0
15u + 0 = 0 + -18w
15u = 0 + -18w
Remove the zero:
15u = -18w

Divide each side by '15'.
u = -1.2w

Simplifying
u = -1.2w