-1+r=-7r-13

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Solution for -1+r=-7r-13 equation: 



-1+r=-7r-13

We move all terms to the left:

-1+r-(-7r-13)=0

We get rid of parentheses

r+7r+13-1=0

We add all the numbers together, and all the variables

8r+12=0

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

8r=-12

r=-12/8

r=-1+1/2

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