-2u=-7-u

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



-2u=-7-u

We move all terms to the left:

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

We add all the numbers together, and all the variables

-2u-(-1u-7)=0

We get rid of parentheses

-2u+1u+7=0

We add all the numbers together, and all the variables

-1u+7=0

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

-u=-7

u=-7/-1

u=+7

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