4r-13=8r-7

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Solution for 4r-13=8r-7 equation: 



4r-13=8r-7

We move all terms to the left:

4r-13-(8r-7)=0

We get rid of parentheses

4r-8r+7-13=0

We add all the numbers together, and all the variables

-4r-6=0

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

-4r=6

r=6/-4

r=-1+1/2

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