3=r/15

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Solution for 3=r/15 equation: 



3=r/15

We move all terms to the left:

3-(r/15)=0

We add all the numbers together, and all the variables

-(+r/15)+3=0

We get rid of parentheses

-r/15+3=0

We multiply all the terms by the denominator


-r+3*15=0

We add all the numbers together, and all the variables

-1r+45=0

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

-r=-45

r=-45/-1

r=+45

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