3u-15=9

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Solution for 3u-15=9 equation: 


Simplifying
3u + -15 = 9

Reorder the terms:
-15 + 3u = 9

Solving
-15 + 3u = 9

Solving for variable 'u'.

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

Add '15' to each side of the equation.
-15 + 15 + 3u = 9 + 15

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

Combine like terms: 9 + 15 = 24
3u = 24

Divide each side by '3'.
u = 8

Simplifying
u = 8

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