13-13u=-8

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Solution for 13-13u=-8 equation: 



13-13u=-8

We move all terms to the left:

13-13u-(-8)=0

We add all the numbers together, and all the variables

-13u+21=0

We move all terms containing u to the left, all other terms to the right

-13u=-21

u=-21/-13

u=1+8/13

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