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20k=19.6k-6.16
We move all terms to the left:
20k-(19.6k-6.16)=0
We get rid of parentheses
20k-19.6k+6.16=0
We add all the numbers together, and all the variables
0.4k+6.16=0
We move all terms containing k to the left, all other terms to the right
0.4k=-6.16
k=-6.16/0.4
k=-15+0.16/0.4
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