9-u=2u

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Solution for 9-u=2u equation:


Simplifying
9 + -1u = 2u

Solving
9 + -1u = 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 + -1u + -2u = 2u + -2u

Combine like terms: -1u + -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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