-3u-6=9

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Solution for -3u-6=9 equation: 


Simplifying
-3u + -6 = 9

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

Solving
-6 + -3u = 9

Solving for variable 'u'.

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

Add '6' to each side of the equation.
-6 + 6 + -3u = 9 + 6

Combine like terms: -6 + 6 = 0
0 + -3u = 9 + 6
-3u = 9 + 6

Combine like terms: 9 + 6 = 15
-3u = 15

Divide each side by '-3'.
u = -5

Simplifying
u = -5

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