-7u-1=-9+u

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Solution for -7u-1=-9+u equation: 



-7u-1=-9+u

We move all terms to the left:

-7u-1-(-9+u)=0

We add all the numbers together, and all the variables

-7u-(u-9)-1=0

We get rid of parentheses

-7u-u+9-1=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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