24=4(12-2r)

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Solution for 24=4(12-2r) equation: 



24=4(12-2r)

We move all terms to the left:

24-(4(12-2r))=0

We add all the numbers together, and all the variables

-(4(-2r+12))+24=0



We calculate terms in parentheses: -(4(-2r+12)), so:

4(-2r+12)

We multiply parentheses

-8r+48

Back to the equation:

-(-8r+48)



We get rid of parentheses

8r-48+24=0

We add all the numbers together, and all the variables

8r-24=0

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

8r=24

r=24/8

r=3

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