-15=-3+2u

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Solution for -15=-3+2u equation: 



-15=-3+2u

We move all terms to the left:

-15-(-3+2u)=0

We add all the numbers together, and all the variables

-(2u-3)-15=0

We get rid of parentheses

-2u+3-15=0

We add all the numbers together, and all the variables

-2u-12=0

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

-2u=12

u=12/-2

u=-6

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