-7-8u=-7+u

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



-7-8u=-7+u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-8u-u+7-7=0

We add all the numbers together, and all the variables

-9u=0

u=0/-9

u=0

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