12(9-4r)=12(4+r)

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Solution for 12(9-4r)=12(4+r) equation: 



12(9-4r)=12(4+r)

We move all terms to the left:

12(9-4r)-(12(4+r))=0

We add all the numbers together, and all the variables

12(-4r+9)-(12(r+4))=0

We multiply parentheses

-48r-(12(r+4))+108=0



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

12(r+4)

We multiply parentheses

12r+48

Back to the equation:

-(12r+48)



We get rid of parentheses

-48r-12r-48+108=0

We add all the numbers together, and all the variables

-60r+60=0

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

-60r=-60

r=-60/-60

r=1

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