57=3(7x+-2)

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Solution for 57=3(7x+-2) equation: 



57=3(7x+-2)

We move all terms to the left:

57-(3(7x+-2))=0

We add all the numbers together, and all the variables

-(3(7x-2))+57=0



We calculate terms in parentheses: -(3(7x-2)), so:

3(7x-2)

We multiply parentheses

21x-6

Back to the equation:

-(21x-6)



We get rid of parentheses

-21x+6+57=0

We add all the numbers together, and all the variables

-21x+63=0

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

-21x=-63

x=-63/-21

x=+3

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