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8(1k+3)=12k+-4
We move all terms to the left:
8(1k+3)-(12k+-4)=0
We add all the numbers together, and all the variables
8(k+3)-(12k-4)=0
We multiply parentheses
8k-(12k-4)+24=0
We get rid of parentheses
8k-12k+4+24=0
We add all the numbers together, and all the variables
-4k+28=0
We move all terms containing k to the left, all other terms to the right
-4k=-28
k=-28/-4
k=+7
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