Resposta :
TK - 273 / 100 = TF - 32 / 180
TK - 273/5 = TF - 32 / 9
TK - 273 = ( 5 * (80 - 32) ) / 9
TK - 273 = 240/9
9TK - 2457 = 240
9TK = 240 + 2457
9TK = 2697
TK = 2697/9
****************************************
TK = 299,67K
TK ~= 300K (aproximadamente)
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TK - 273/5 = TF - 32 / 9
TK - 273 = ( 5 * (80 - 32) ) / 9
TK - 273 = 240/9
9TK - 2457 = 240
9TK = 240 + 2457
9TK = 2697
TK = 2697/9
****************************************
TK = 299,67K
TK ~= 300K (aproximadamente)
***************************************