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