10u-21u=7u

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Solution for 10u-21u=7u equation: 


Simplifying
10u + -21u = 7u

Combine like terms: 10u + -21u = -11u
-11u = 7u

Solving
-11u = 7u

Solving for variable 'u'.

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

Add '-7u' to each side of the equation.
-11u + -7u = 7u + -7u

Combine like terms: -11u + -7u = -18u
-18u = 7u + -7u

Combine like terms: 7u + -7u = 0
-18u = 0

Divide each side by '-18'.
u = 0

Simplifying
u = 0

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