Respostas

2014-07-28T16:20:40-03:00
Tc/5 = Tf - 32/9
45/5 = Tf - 32/9
9*9 = Tf - 32
81 + 32 = Tf

Tf = 113°F
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2014-07-28T16:26:13-03:00
Vamos lá:
 \frac{Tc}{5} =  \frac{Tf - 32}{9}
 \frac{45}{5}  =  \frac{Tf - 32}{9} ⇒
9 =  \frac{Tf - 32}{9}  ⇒
Tf - 32 = 81
Tf = 113