10u=21+3u

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Solution for 10u=21+3u equation: 


Simplifying
10u = 21 + 3u

Solving
10u = 21 + 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.
10u + -3u = 21 + 3u + -3u

Combine like terms: 10u + -3u = 7u
7u = 21 + 3u + -3u

Combine like terms: 3u + -3u = 0
7u = 21 + 0
7u = 21

Divide each side by '7'.
u = 3

Simplifying
u = 3

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