-81+u=-72

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Solution for -81+u=-72 equation: 


Simplifying
-81 + u = -72

Solving
-81 + u = -72

Solving for variable 'u'.

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

Add '81' to each side of the equation.
-81 + 81 + u = -72 + 81

Combine like terms: -81 + 81 = 0
0 + u = -72 + 81
u = -72 + 81

Combine like terms: -72 + 81 = 9
u = 9

Simplifying
u = 9

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