-80=-2(5k-2)-4(k-7)

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Solution for -80=-2(5k-2)-4(k-7) equation: 



-80=-2(5k-2)-4(k-7)

We move all terms to the left:

-80-(-2(5k-2)-4(k-7))=0



We calculate terms in parentheses: -(-2(5k-2)-4(k-7)), so:

-2(5k-2)-4(k-7)

We multiply parentheses

-10k-4k+4+28

We add all the numbers together, and all the variables

-14k+32

Back to the equation:

-(-14k+32)



We get rid of parentheses

14k-32-80=0

We add all the numbers together, and all the variables

14k-112=0

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

14k=112

k=112/14

k=8

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