-42=-4k+3(-3k-1)

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Solution for -42=-4k+3(-3k-1) equation: 



-42=-4k+3(-3k-1)

We move all terms to the left:

-42-(-4k+3(-3k-1))=0



We calculate terms in parentheses: -(-4k+3(-3k-1)), so:

-4k+3(-3k-1)

We multiply parentheses

-4k-9k-3

We add all the numbers together, and all the variables

-13k-3

Back to the equation:

-(-13k-3)



We get rid of parentheses

13k+3-42=0

We add all the numbers together, and all the variables

13k-39=0

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

13k=39

k=39/13

k=3

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