13=5r-12

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Solution for 13=5r-12 equation: 



13=5r-12

We move all terms to the left:

13-(5r-12)=0

We get rid of parentheses

-5r+12+13=0

We add all the numbers together, and all the variables

-5r+25=0

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

-5r=-25

r=-25/-5

r=+5

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