r+7=4r+13

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



r+7=4r+13

We move all terms to the left:

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

We get rid of parentheses

r-4r-13+7=0

We add all the numbers together, and all the variables

-3r-6=0

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

-3r=6

r=6/-3

r=-2

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