-13=r/9+8r=

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



-13=r/9+8r=

We move all terms to the left:

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



Domain of the equation: 9+8r)!=0

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

8r)!=-9

r!=-9/1

r!=-9

r∈R



We add all the numbers together, and all the variables

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

We get rid of parentheses

-8r-r/9-13=0

We multiply all the terms by the denominator


-8r*9-r-13*9=0

We add all the numbers together, and all the variables

-1r-8r*9-117=0

Wy multiply elements

-1r-72r-117=0

We add all the numbers together, and all the variables

-73r-117=0

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

-73r=117

r=117/-73

r=-1+44/73

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