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k in (-oo:+oo)
191.8 = (9/5)*(k-273.15)+32 // - (9/5)*(k-273.15)+32
191.8-((9/5)*(k-273.15))-32 = 0
(-9/5)*(k-273.15)-32+191.8 = 0
191.8-9/5*(k-273.15)-32 = 0
191.8-9/5*(k-273.15)-32 = 0
191.8-9/5*k+459.67 = 0
651.47-9/5*k = 0
651.47-9/5*k = 0
651.47-9/5*k = 0 // - 651.47
-9/5*k = -651.47 // : -9/5
k = -651.47/(-9/5)
k = 361.92777778
k = 361.92777778
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