-7=-2+-u

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Solution for -7=-2+-u equation: 



-7=-2+-u

We move all terms to the left:

-7-(-2+-u)=0

We add all the numbers together, and all the variables

-(-1u)-7=0

We get rid of parentheses

1u-7=0

We add all the numbers together, and all the variables

u-7=0

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

u=7

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