-13=(r/9)+8

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Solution for -13=(r/9)+8 equation: 



-13=(r/9)+8

We move all terms to the left:

-13-((r/9)+8)=0

We add all the numbers together, and all the variables

-((+r/9)+8)-13=0

We multiply all the terms by the denominator


-((+r-13*9)+8)=0



We calculate terms in parentheses: -((+r-13*9)+8), so:

(+r-13*9)+8

We add all the numbers together, and all the variables

(r-117)+8

We get rid of parentheses

r-117+8

We add all the numbers together, and all the variables

r-109

Back to the equation:

-(r-109)



We get rid of parentheses

-r+109=0

We add all the numbers together, and all the variables

-1r+109=0

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

-r=-109

r=-109/-1

r=+109

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