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216=8k-8(-2k-3)
We move all terms to the left:
216-(8k-8(-2k-3))=0
We calculate terms in parentheses: -(8k-8(-2k-3)), so:We get rid of parentheses
8k-8(-2k-3)
We multiply parentheses
8k+16k+24
We add all the numbers together, and all the variables
24k+24
Back to the equation:
-(24k+24)
-24k-24+216=0
We add all the numbers together, and all the variables
-24k+192=0
We move all terms containing k to the left, all other terms to the right
-24k=-192
k=-192/-24
k=+8
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