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2.2k-1.9=8.1
We move all terms to the left:
2.2k-1.9-(8.1)=0
We add all the numbers together, and all the variables
2.2k-10=0
We move all terms containing k to the left, all other terms to the right
2.2k=10
k=10/2.2
k=4+1/1.8333333333333
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