8r-13=4r+7

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



8r-13=4r+7

We move all terms to the left:

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

We get rid of parentheses

8r-4r-7-13=0

We add all the numbers together, and all the variables

4r-20=0

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

4r=20

r=20/4

r=5

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