-6-7u=-9u

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Solution for -6-7u=-9u equation: 



-6-7u=-9u

We move all terms to the left:

-6-7u-(-9u)=0

We get rid of parentheses

-7u+9u-6=0

We add all the numbers together, and all the variables

2u-6=0

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

2u=6

u=6/2

u=3

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