4=-r/5

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Solution for 4=-r/5 equation: 



4=-r/5

We move all terms to the left:

4-(-r/5)=0

We get rid of parentheses

r/5+4=0

We multiply all the terms by the denominator


r+4*5=0

We add all the numbers together, and all the variables

r+20=0

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

r=-20

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