-7u+7=-8u

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Solution for -7u+7=-8u equation: 



-7u+7=-8u

We move all terms to the left:

-7u+7-(-8u)=0

We get rid of parentheses

-7u+8u+7=0

We add all the numbers together, and all the variables

u+7=0

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

u=-7

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