20=r/3-5

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Solution for 20=r/3-5 equation: 



20=r/3-5

We move all terms to the left:

20-(r/3-5)=0

We get rid of parentheses

-r/3+5+20=0

We multiply all the terms by the denominator


-r+5*3+20*3=0

We add all the numbers together, and all the variables

-1r+75=0

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

-r=-75

r=-75/-1

r=+75

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