9=2u-9

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Solution for 9=2u-9 equation:


Simplifying
9 = 2u + -9

Reorder the terms:
9 = -9 + 2u

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

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

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

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

Combine like terms: -9 + -9 = -18
-2u = -18

Divide each side by '-2'.
u = 9

Simplifying
u = 9

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