15=6(u+3)-3u

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Solution for 15=6(u+3)-3u equation:


Simplifying
15 = 6(u + 3) + -3u

Reorder the terms:
15 = 6(3 + u) + -3u
15 = (3 * 6 + u * 6) + -3u
15 = (18 + 6u) + -3u

Combine like terms: 6u + -3u = 3u
15 = 18 + 3u

Solving
15 = 18 + 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.
15 + -3u = 18 + 3u + -3u

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

Add '-15' to each side of the equation.
15 + -15 + -3u = 18 + -15

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

Combine like terms: 18 + -15 = 3
-3u = 3

Divide each side by '-3'.
u = -1

Simplifying
u = -1

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