Respostas

2013-08-08T11:58:18-03:00
Tc = 3Tf

Tc/5 = Tf - 32 / 9

3Tf/5 = Tf - 32/9

9*(3Tf) = 5Tf - 160

27Tf - 5tf = - 160

22Tf = - 160

Tf = -160/22

Tf = - 7,27°F (aproximadamente)
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