12(-2r-4)=-3(r-12)

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Solution for 12(-2r-4)=-3(r-12) equation: 



12(-2r-4)=-3(r-12)

We move all terms to the left:

12(-2r-4)-(-3(r-12))=0

We multiply parentheses

-24r-(-3(r-12))-48=0



We calculate terms in parentheses: -(-3(r-12)), so:

-3(r-12)

We multiply parentheses

-3r+36

Back to the equation:

-(-3r+36)



We get rid of parentheses

-24r+3r-36-48=0

We add all the numbers together, and all the variables

-21r-84=0

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

-21r=84

r=84/-21

r=-4

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