8=r/9

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Solution for 8=r/9 equation: 



8=r/9

We move all terms to the left:

8-(r/9)=0

We add all the numbers together, and all the variables

-(+r/9)+8=0

We get rid of parentheses

-r/9+8=0

We multiply all the terms by the denominator


-r+8*9=0

We add all the numbers together, and all the variables

-1r+72=0

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

-r=-72

r=-72/-1

r=+72

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