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218=2k-8(-1+4k)
We move all terms to the left:
218-(2k-8(-1+4k))=0
We add all the numbers together, and all the variables
-(2k-8(4k-1))+218=0
We calculate terms in parentheses: -(2k-8(4k-1)), so:We get rid of parentheses
2k-8(4k-1)
We multiply parentheses
2k-32k+8
We add all the numbers together, and all the variables
-30k+8
Back to the equation:
-(-30k+8)
30k-8+218=0
We add all the numbers together, and all the variables
30k+210=0
We move all terms containing k to the left, all other terms to the right
30k=-210
k=-210/30
k=-7
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