-6=2+u

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Solution for -6=2+u equation: 



-6=2+u

We move all terms to the left:

-6-(2+u)=0

We add all the numbers together, and all the variables

-(u+2)-6=0

We get rid of parentheses

-u-2-6=0

We add all the numbers together, and all the variables

-1u-8=0

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

-u=8

u=8/-1

u=-8

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