-2u=13-u

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Solution for -2u=13-u equation: 



-2u=13-u

We move all terms to the left:

-2u-(13-u)=0

We add all the numbers together, and all the variables

-2u-(-1u+13)=0

We get rid of parentheses

-2u+1u-13=0

We add all the numbers together, and all the variables

-1u-13=0

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

-u=13

u=13/-1

u=-13

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