18=r/4+15

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Solution for 18=r/4+15 equation: 



18=r/4+15

We move all terms to the left:

18-(r/4+15)=0

We get rid of parentheses

-r/4-15+18=0

We multiply all the terms by the denominator


-r-15*4+18*4=0

We add all the numbers together, and all the variables

-1r+12=0

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

-r=-12

r=-12/-1

r=+12

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