Jawabanmu

2014-01-21T16:54:23+07:00
Rumusnya bisa pke perbandingan >>> C/100 = F-32/180 = R/80
2014-01-21T18:12:11+07:00
R  : C  :  F
4  : 5  : 9
C = 5/F x X
F  = 9/5 x X