18=u+2u

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Solution for 18=u+2u equation:


Simplifying
18 = u + 2u

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

Solving
18 = 3u

Solving for variable 'u'.

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

Add '-3u' to each side of the equation.
18 + -3u = 3u + -3u

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

Add '-18' to each side of the equation.
18 + -18 + -3u = 0 + -18

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

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

Divide each side by '-3'.
u = 6

Simplifying
u = 6

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