Respostas

2014-03-10T17:20:34-03:00
0°X = 100°C
120°X = 0°C
-40°X = x°C

 \frac{100-x}{100-0}  \frac{0 - (-40)}{0 - 120}

 \frac{100-x}{100}  \frac{40}{-120}

-12000x = 4000

x =  \frac{4000}{-12000}

x = -8

-40°X = -8°C