-9u-9=1-7u

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



-9u-9=1-7u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

-2u-10=0

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

-2u=10

u=10/-2

u=-5

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