u-3+11=21

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Solution for u-3+11=21 equation: 


Simplifying
u + -3 + 11 = 21

Reorder the terms:
-3 + 11 + u = 21

Combine like terms: -3 + 11 = 8
8 + u = 21

Solving
8 + u = 21

Solving for variable 'u'.

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

Add '-8' to each side of the equation.
8 + -8 + u = 21 + -8

Combine like terms: 8 + -8 = 0
0 + u = 21 + -8
u = 21 + -8

Combine like terms: 21 + -8 = 13
u = 13

Simplifying
u = 13

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