u-8=-9

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Solution for u-8=-9 equation: 


Simplifying
u + -8 = -9

Reorder the terms:
-8 + u = -9

Solving
-8 + u = -9

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 = -9 + 8

Combine like terms: -8 + 8 = 0
0 + u = -9 + 8
u = -9 + 8

Combine like terms: -9 + 8 = -1
u = -1

Simplifying
u = -1

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