-13=7r-3+2r

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Solution for -13=7r-3+2r equation: 



-13=7r-3+2r

We move all terms to the left:

-13-(7r-3+2r)=0

We add all the numbers together, and all the variables

-(9r-3)-13=0

We get rid of parentheses

-9r+3-13=0

We add all the numbers together, and all the variables

-9r-10=0

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

-9r=10

r=10/-9

r=-1+1/9

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