9(r+3)-2r=-12(r-7)

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Solution for 9(r+3)-2r=-12(r-7) equation: 



9(r+3)-2r=-12(r-7)

We move all terms to the left:

9(r+3)-2r-(-12(r-7))=0

We add all the numbers together, and all the variables

-2r+9(r+3)-(-12(r-7))=0

We multiply parentheses

-2r+9r-(-12(r-7))+27=0



We calculate terms in parentheses: -(-12(r-7)), so:

-12(r-7)

We multiply parentheses

-12r+84

Back to the equation:

-(-12r+84)



We add all the numbers together, and all the variables

7r-(-12r+84)+27=0

We get rid of parentheses

7r+12r-84+27=0

We add all the numbers together, and all the variables

19r-57=0

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

19r=57

r=57/19

r=3

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