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6+6(5-k)=15
We move all terms to the left:
6+6(5-k)-(15)=0
We add all the numbers together, and all the variables
6(-1k+5)+6-15=0
We add all the numbers together, and all the variables
6(-1k+5)-9=0
We multiply parentheses
-6k+30-9=0
We add all the numbers together, and all the variables
-6k+21=0
We move all terms containing k to the left, all other terms to the right
-6k=-21
k=-21/-6
k=3+1/2
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