u-3u-18=0

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Solution for u-3u-18=0 equation:


Simplifying
u + -3u + -18 = 0

Reorder the terms:
-18 + u + -3u = 0

Combine like terms: u + -3u = -2u
-18 + -2u = 0

Solving
-18 + -2u = 0

Solving for variable 'u'.

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

Add '18' to each side of the equation.
-18 + 18 + -2u = 0 + 18

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

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

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

Simplifying
u = -9

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