57=2(3+r)

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Solution for 57=2(3+r) equation: 



57=2(3+r)

We move all terms to the left:

57-(2(3+r))=0

We add all the numbers together, and all the variables

-(2(r+3))+57=0



We calculate terms in parentheses: -(2(r+3)), so:

2(r+3)

We multiply parentheses

2r+6

Back to the equation:

-(2r+6)



We get rid of parentheses

-2r-6+57=0

We add all the numbers together, and all the variables

-2r+51=0

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

-2r=-51

r=-51/-2

r=25+1/2

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