42=-7(8+2k)

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Solution for 42=-7(8+2k) equation: 



42=-7(8+2k)

We move all terms to the left:

42-(-7(8+2k))=0

We add all the numbers together, and all the variables

-(-7(2k+8))+42=0



We calculate terms in parentheses: -(-7(2k+8)), so:

-7(2k+8)

We multiply parentheses

-14k-56

Back to the equation:

-(-14k-56)



We get rid of parentheses

14k+56+42=0

We add all the numbers together, and all the variables

14k+98=0

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

14k=-98

k=-98/14

k=-7

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