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6(7+k)=54
We move all terms to the left:
6(7+k)-(54)=0
We add all the numbers together, and all the variables
6(k+7)-54=0
We multiply parentheses
6k+42-54=0
We add all the numbers together, and all the variables
6k-12=0
We move all terms containing k to the left, all other terms to the right
6k=12
k=12/6
k=2
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