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12k+9=3(4+3)
We move all terms to the left:
12k+9-(3(4+3))=0
We add all the numbers together, and all the variables
12k+9-(37)=0
We add all the numbers together, and all the variables
12k-28=0
We move all terms containing k to the left, all other terms to the right
12k=28
k=28/12
k=2+1/3
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