9=7+r/9

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Solution for 9=7+r/9 equation: 



9=7+r/9

We move all terms to the left:

9-(7+r/9)=0

We add all the numbers together, and all the variables

-(r/9+7)+9=0

We get rid of parentheses

-r/9-7+9=0

We multiply all the terms by the denominator


-r-7*9+9*9=0

We add all the numbers together, and all the variables

-1r+18=0

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

-r=-18

r=-18/-1

r=+18

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