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

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


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

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

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

Solving
-21 + 6u = -9

Solving for variable 'u'.

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

Add '21' to each side of the equation.
-21 + 21 + 6u = -9 + 21

Combine like terms: -21 + 21 = 0
0 + 6u = -9 + 21
6u = -9 + 21

Combine like terms: -9 + 21 = 12
6u = 12

Divide each side by '6'.
u = 2

Simplifying
u = 2

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