Jawabanmu

2014-06-02T15:23:10+07:00
TX - tb / ta - tb = tC - tb / ta - tb
tX - (-5) / 12 - (-5) = 40 - 0 / 100 - 0
tX + 5 / 17 = 40 / 100
17 x 40 = 100tX + 500
680 = 100tX + 500
680 - 500  = 100tX
180 = 100tX
Tx = 1,8 Derajat A

ket : tb : titik beku
ta : titik didih