3u=-9u-12

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Solution for 3u=-9u-12 equation: 


Simplifying
3u = -9u + -12

Reorder the terms:
3u = -12 + -9u

Solving
3u = -12 + -9u

Solving for variable 'u'.

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

Add '9u' to each side of the equation.
3u + 9u = -12 + -9u + 9u

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

Combine like terms: -9u + 9u = 0
12u = -12 + 0
12u = -12

Divide each side by '12'.
u = -1

Simplifying
u = -1

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