-42=3(4r+2)

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Solution for -42=3(4r+2) equation: 



-42=3(4r+2)

We move all terms to the left:

-42-(3(4r+2))=0



We calculate terms in parentheses: -(3(4r+2)), so:

3(4r+2)

We multiply parentheses

12r+6

Back to the equation:

-(12r+6)



We get rid of parentheses

-12r-6-42=0

We add all the numbers together, and all the variables

-12r-48=0

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

-12r=48

r=48/-12

r=-4

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