-7=r/12-9

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Solution for -7=r/12-9 equation: 



-7=r/12-9

We move all terms to the left:

-7-(r/12-9)=0

We get rid of parentheses

-r/12+9-7=0

We multiply all the terms by the denominator


-r+9*12-7*12=0

We add all the numbers together, and all the variables

-1r+24=0

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

-r=-24

r=-24/-1

r=+24

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