r+20+9r=-20-10

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Solution for r+20+9r=-20-10 equation: 



r+20+9r=-20-10

We move all terms to the left:

r+20+9r-(-20-10)=0

We add all the numbers together, and all the variables

r+9r+20-(-30)=0

We add all the numbers together, and all the variables

10r+50=0

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

10r=-50

r=-50/10

r=-5

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