80=-4(8k+8)-8(k+1)

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Solution for 80=-4(8k+8)-8(k+1) equation: 



80=-4(8k+8)-8(k+1)

We move all terms to the left:

80-(-4(8k+8)-8(k+1))=0



We calculate terms in parentheses: -(-4(8k+8)-8(k+1)), so:

-4(8k+8)-8(k+1)

We multiply parentheses

-32k-8k-32-8

We add all the numbers together, and all the variables

-40k-40

Back to the equation:

-(-40k-40)



We get rid of parentheses

40k+40+80=0

We add all the numbers together, and all the variables

40k+120=0

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

40k=-120

k=-120/40

k=-3

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