42=2(4+l)

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Solution for 42=2(4+l) equation: 



42=2(4+l)

We move all terms to the left:

42-(2(4+l))=0

We add all the numbers together, and all the variables

-(2(l+4))+42=0



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

2(l+4)

We multiply parentheses

2l+8

Back to the equation:

-(2l+8)



We get rid of parentheses

-2l-8+42=0

We add all the numbers together, and all the variables

-2l+34=0

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

-2l=-34

l=-34/-2

l=+17

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