-9r+5=20

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Solution for -9r+5=20 equation: 



-9r+5=20

We move all terms to the left:

-9r+5-(20)=0

We add all the numbers together, and all the variables

-9r-15=0

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

-9r=15

r=15/-9

r=-1+2/3

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