9+u=-2u

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Solution for 9+u=-2u equation:


Simplifying
9 + u = -2u

Solving
9 + u = -2u

Solving for variable 'u'.

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

Add '2u' to each side of the equation.
9 + u + 2u = -2u + 2u

Combine like terms: u + 2u = 3u
9 + 3u = -2u + 2u

Combine like terms: -2u + 2u = 0
9 + 3u = 0

Add '-9' to each side of the equation.
9 + -9 + 3u = 0 + -9

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

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

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

Simplifying
u = -3

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