18=18u-9u

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Solution for 18=18u-9u equation:


Simplifying
18 = 18u + -9u

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

Solving
18 = 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.
18 + -9u = 9u + -9u

Combine like terms: 9u + -9u = 0
18 + -9u = 0

Add '-18' to each side of the equation.
18 + -18 + -9u = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -9u = 0 + -18
-9u = 0 + -18

Combine like terms: 0 + -18 = -18
-9u = -18

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

Simplifying
u = 2

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