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2(4+4k)+2=42
We move all terms to the left:
2(4+4k)+2-(42)=0
We add all the numbers together, and all the variables
2(4k+4)+2-42=0
We add all the numbers together, and all the variables
2(4k+4)-40=0
We multiply parentheses
8k+8-40=0
We add all the numbers together, and all the variables
8k-32=0
We move all terms containing k to the left, all other terms to the right
8k=32
k=32/8
k=4
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