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k in (-oo:+oo)
k/54.7 = 1.8 // - 1.8
k/54.7-1.8 = 0
0.01828154*k-1.8 = 0 // + 1.8
0.01828154*k = 1.8 // : 0.01828154
k = 1.8/0.01828154
k = 98.45997657
k = 98.45997657
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