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12=3k-4
We move all terms to the left:
12-(3k-4)=0
We get rid of parentheses
-3k+4+12=0
We add all the numbers together, and all the variables
-3k+16=0
We move all terms containing k to the left, all other terms to the right
-3k=-16
k=-16/-3
k=5+1/3
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