3u=12+u

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Solution for 3u=12+u equation: 


Simplifying
3u = 12 + u

Solving
3u = 12 + u

Solving for variable 'u'.

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

Add '-1u' to each side of the equation.
3u + -1u = 12 + u + -1u

Combine like terms: 3u + -1u = 2u
2u = 12 + u + -1u

Combine like terms: u + -1u = 0
2u = 12 + 0
2u = 12

Divide each side by '2'.
u = 6

Simplifying
u = 6

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