42=3(2x+1)

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Solution for 42=3(2x+1) equation: 



42=3(2x+1)

We move all terms to the left:

42-(3(2x+1))=0



We calculate terms in parentheses: -(3(2x+1)), so:

3(2x+1)

We multiply parentheses

6x+3

Back to the equation:

-(6x+3)



We get rid of parentheses

-6x-3+42=0

We add all the numbers together, and all the variables

-6x+39=0

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

-6x=-39

x=-39/-6

x=6+1/2

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