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4k+7=7k-1k=4
We move all terms to the left:
4k+7-(7k-1k)=0
We add all the numbers together, and all the variables
4k-(+6k)+7=0
We get rid of parentheses
4k-6k+7=0
We add all the numbers together, and all the variables
-2k+7=0
We move all terms containing k to the left, all other terms to the right
-2k=-7
k=-7/-2
k=3+1/2
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