-9=3(6r-1)+2(r+7)

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Solution for -9=3(6r-1)+2(r+7) equation: 



-9=3(6r-1)+2(r+7)

We move all terms to the left:

-9-(3(6r-1)+2(r+7))=0



We calculate terms in parentheses: -(3(6r-1)+2(r+7)), so:

3(6r-1)+2(r+7)

We multiply parentheses

18r+2r-3+14

We add all the numbers together, and all the variables

20r+11

Back to the equation:

-(20r+11)



We get rid of parentheses

-20r-11-9=0

We add all the numbers together, and all the variables

-20r-20=0

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

-20r=20

r=20/-20

r=-1

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