Jawabanmu

2014-01-20T20:23:33+07:00
suhu celsius = suhu fahrenheit pada -40 derajat

 \frac{c}{f-32} = \frac{5}{9} \\c= \frac{5(f-32)}{9} \\  \\  \\ F=C,maka \\  \\ F=\frac{5(F-32)}{9} \\  \\ 9F=5F-160 \\ 9F-5F=-160 \\ 4F=-160 \\ F= \frac{-160}{4} \\  \\ F=-40