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4.9=k+0.8
We move all terms to the left:
4.9-(k+0.8)=0
We get rid of parentheses
-k-0.8+4.9=0
We add all the numbers together, and all the variables
-1k+4.1=0
We move all terms containing k to the left, all other terms to the right
-k=-4.1
k=-4.1/-1
k=4+0.1/1
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