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4.9+1.2k=5.1
We move all terms to the left:
4.9+1.2k-(5.1)=0
We add all the numbers together, and all the variables
1.2k-0.2=0
We move all terms containing k to the left, all other terms to the right
1.2k=0.2
k=0.2/1.2
k=0.2/1.2
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