Respostas

2014-03-13T14:37:47-03:00
Tc/5  = tf -32 /9
60/5 = tf-32/9
12= tf-32/9
tf-32= 108
tf= 108-32
tf= 76 º F
2 1 2
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2014-03-13T14:40:28-03:00
C/5=(F-32)/9
 60/5=(F-32)/9
12.9=F-32
108=F-32
108+32=F
F=140 
9 4 9