15-9u=2u-18

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Solution for 15-9u=2u-18 equation:


Simplifying
15 + -9u = 2u + -18

Reorder the terms:
15 + -9u = -18 + 2u

Solving
15 + -9u = -18 + 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.
15 + -9u + -2u = -18 + 2u + -2u

Combine like terms: -9u + -2u = -11u
15 + -11u = -18 + 2u + -2u

Combine like terms: 2u + -2u = 0
15 + -11u = -18 + 0
15 + -11u = -18

Add '-15' to each side of the equation.
15 + -15 + -11u = -18 + -15

Combine like terms: 15 + -15 = 0
0 + -11u = -18 + -15
-11u = -18 + -15

Combine like terms: -18 + -15 = -33
-11u = -33

Divide each side by '-11'.
u = 3

Simplifying
u = 3

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