13=r/3+4

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Solution for 13=r/3+4 equation: 



13=r/3+4

We move all terms to the left:

13-(r/3+4)=0

We get rid of parentheses

-r/3-4+13=0

We multiply all the terms by the denominator


-r-4*3+13*3=0

We add all the numbers together, and all the variables

-1r+27=0

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

-r=-27

r=-27/-1

r=+27

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