13u+-12u=-13

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Solution for 13u+-12u=-13 equation: 


Simplifying
13u + -12u = -13

Combine like terms: 13u + -12u = 1u
1u = -13

Solving
1u = -13

Solving for variable 'u'.

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

Divide each side by '1'.
u = -13

Simplifying
u = -13

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