3=r/20-5

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Solution for 3=r/20-5 equation: 



3=r/20-5

We move all terms to the left:

3-(r/20-5)=0

We get rid of parentheses

-r/20+5+3=0

We multiply all the terms by the denominator


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

We add all the numbers together, and all the variables

-1r+160=0

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

-r=-160

r=-160/-1

r=+160

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