-8r-13=-7r

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Solution for -8r-13=-7r equation: 



-8r-13=-7r

We move all terms to the left:

-8r-13-(-7r)=0

We get rid of parentheses

-8r+7r-13=0

We add all the numbers together, and all the variables

-1r-13=0

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

-r=13

r=13/-1

r=-13

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