12+3r=3(r+4)

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Solution for 12+3r=3(r+4) equation: 



12+3r=3(r+4)

We move all terms to the left:

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



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

3(r+4)

We multiply parentheses

3r+12

Back to the equation:

-(3r+12)



We get rid of parentheses

3r-3r-12+12=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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