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 = 4u
-18 + 4u = 0

Solving
-18 + 4u = 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 + 4u = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 4u = 0 + 18
4u = 0 + 18

Combine like terms: 0 + 18 = 18
4u = 18

Divide each side by '4'.
u = 4.5

Simplifying
u = 4.5

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