tolong dong gampang nih tentang termometer x

konversi suhu pada termometer
Termomter X
Titik Atas = Ta =170
Titik Bawah = Tb = 20
skala = Ta - Tb = 170 - 20 = 150

Termometer Celcius
TA = 100
TB = 0
skala =100 - 0 = 100

140 X = ......°C
140 x = (skala C/skala X)   ( 140 - Tb X )+ Tb C
140 X = 100/150 (140 - 20) + 0°C
140 x = 2/3 (120) = 80° C