r/13=30

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Solution for r/13=30 equation: 



r/13=30

We move all terms to the left:

r/13-(30)=0

We multiply all the terms by the denominator


r-30*13=0

We add all the numbers together, and all the variables

r-390=0

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

r=390

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