-492=12(4+5r)

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Solution for -492=12(4+5r) equation: 



-492=12(4+5r)

We move all terms to the left:

-492-(12(4+5r))=0

We add all the numbers together, and all the variables

-(12(5r+4))-492=0



We calculate terms in parentheses: -(12(5r+4)), so:

12(5r+4)

We multiply parentheses

60r+48

Back to the equation:

-(60r+48)



We get rid of parentheses

-60r-48-492=0

We add all the numbers together, and all the variables

-60r-540=0

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

-60r=540

r=540/-60

r=-9

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