-85=5-9r

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Solution for -85=5-9r equation: 



-85=5-9r

We move all terms to the left:

-85-(5-9r)=0

We add all the numbers together, and all the variables

-(-9r+5)-85=0

We get rid of parentheses

9r-5-85=0

We add all the numbers together, and all the variables

9r-90=0

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

9r=90

r=90/9

r=10

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