9=3(u+7)-6u

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Solution for 9=3(u+7)-6u equation:


Simplifying
9 = 3(u + 7) + -6u

Reorder the terms:
9 = 3(7 + u) + -6u
9 = (7 * 3 + u * 3) + -6u
9 = (21 + 3u) + -6u

Combine like terms: 3u + -6u = -3u
9 = 21 + -3u

Solving
9 = 21 + -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.
9 + 3u = 21 + -3u + 3u

Combine like terms: -3u + 3u = 0
9 + 3u = 21 + 0
9 + 3u = 21

Add '-9' to each side of the equation.
9 + -9 + 3u = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 3u = 21 + -9
3u = 21 + -9

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

Divide each side by '3'.
u = 4

Simplifying
u = 4

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