-u=-8+u

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Solution for -u=-8+u equation: 



-u=-8+u

We move all terms to the left:

-u-(-8+u)=0

We add all the numbers together, and all the variables

-u-(u-8)=0

We add all the numbers together, and all the variables

-1u-(u-8)=0

We get rid of parentheses

-1u-u+8=0

We add all the numbers together, and all the variables

-2u+8=0

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

-2u=-8

u=-8/-2

u=+4

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