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19.2+16.3k+7.5k=-64.1
We move all terms to the left:
19.2+16.3k+7.5k-(-64.1)=0
We add all the numbers together, and all the variables
23.8k+83.3=0
We move all terms containing k to the left, all other terms to the right
23.8k=-83.3
k=-83.3/23.8
k=-3+6.26315789474/12.5263157895
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