-2u=9-u

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Solution for -2u=9-u equation:


Simplifying
-2u = 9 + -1u

Solving
-2u = 9 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
-2u + u = 9 + -1u + u

Combine like terms: -2u + u = -1u
-1u = 9 + -1u + u

Combine like terms: -1u + u = 0
-1u = 9 + 0
-1u = 9

Divide each side by '-1'.
u = -9

Simplifying
u = -9

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