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2(k-7)=4k
We move all terms to the left:
2(k-7)-(4k)=0
We add all the numbers together, and all the variables
-4k+2(k-7)=0
We multiply parentheses
-4k+2k-14=0
We add all the numbers together, and all the variables
-2k-14=0
We move all terms containing k to the left, all other terms to the right
-2k=14
k=14/-2
k=-7
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