r+4=13-3r

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Solution for r+4=13-3r equation: 



r+4=13-3r

We move all terms to the left:

r+4-(13-3r)=0

We add all the numbers together, and all the variables

r-(-3r+13)+4=0

We get rid of parentheses

r+3r-13+4=0

We add all the numbers together, and all the variables

4r-9=0

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

4r=9

r=9/4

r=2+1/4

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