-8u-1=-9-9u

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Solution for -8u-1=-9-9u equation: 



-8u-1=-9-9u

We move all terms to the left:

-8u-1-(-9-9u)=0

We add all the numbers together, and all the variables

-8u-(-9u-9)-1=0

We get rid of parentheses

-8u+9u+9-1=0

We add all the numbers together, and all the variables

u+8=0

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

u=-8

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