R=4(b+3)

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Solution for R=4(b+3) equation: 



=4(R+3)

We move all terms to the left:

-(4(R+3))=0



We calculate terms in parentheses: -(4(R+3)), so:

4(R+3)

We multiply parentheses

4R+12

Back to the equation:

-(4R+12)



We get rid of parentheses

-4R-12=0

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

-4R=12

R=12/-4

R=-3

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