-9=17+r

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Solution for -9=17+r equation: 



-9=17+r

We move all terms to the left:

-9-(17+r)=0

We add all the numbers together, and all the variables

-(r+17)-9=0

We get rid of parentheses

-r-17-9=0

We add all the numbers together, and all the variables

-1r-26=0

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

-r=26

r=26/-1

r=-26

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