-7u+9=-9u-1

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



-7u+9=-9u-1

We move all terms to the left:

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

We get rid of parentheses

-7u+9u+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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