-4r+5=-9r-20

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Solution for -4r+5=-9r-20 equation: 



-4r+5=-9r-20

We move all terms to the left:

-4r+5-(-9r-20)=0

We get rid of parentheses

-4r+9r+20+5=0

We add all the numbers together, and all the variables

5r+25=0

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

5r=-25

r=-25/5

r=-5

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