-12=-6u+3(u+3)

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Solution for -12=-6u+3(u+3) equation:


Simplifying
-12 = -6u + 3(u + 3)

Reorder the terms:
-12 = -6u + 3(3 + u)
-12 = -6u + (3 * 3 + u * 3)
-12 = -6u + (9 + 3u)

Reorder the terms:
-12 = 9 + -6u + 3u

Combine like terms: -6u + 3u = -3u
-12 = 9 + -3u

Solving
-12 = 9 + -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.
-12 + 3u = 9 + -3u + 3u

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

Add '12' to each side of the equation.
-12 + 12 + 3u = 9 + 12

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

Combine like terms: 9 + 12 = 21
3u = 21

Divide each side by '3'.
u = 7

Simplifying
u = 7

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