-7=1-8u

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Solution for -7=1-8u equation: 



-7=1-8u

We move all terms to the left:

-7-(1-8u)=0

We add all the numbers together, and all the variables

-(-8u+1)-7=0

We get rid of parentheses

8u-1-7=0

We add all the numbers together, and all the variables

8u-8=0

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

8u=8

u=8/8

u=1

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