-6+-u=-9

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Solution for -6+-u=-9 equation: 


Simplifying
-6 + -1u = -9

Solving
-6 + -1u = -9

Solving for variable 'u'.

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

Add '6' to each side of the equation.
-6 + 6 + -1u = -9 + 6

Combine like terms: -6 + 6 = 0
0 + -1u = -9 + 6
-1u = -9 + 6

Combine like terms: -9 + 6 = -3
-1u = -3

Divide each side by '-1'.
u = 3

Simplifying
u = 3

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