2/5:x=4/5:60 0.2/6.3=X/5 0.6:x=15:1 12:14=X :1/6

问题描述:

2/5:x=4/5:60 0.2/6.3=X/5 0.6:x=15:1 12:14=X :1/6

(1)5/2:x=5/4:60(5/2)/x=(5/4)/60(5/4)x=(5/2)60x=120(2)6.3/0.2=x/5x =(6.3/0.2)5= 6.3(3)0.6:x=15:10.6/x = 15/1x=0.6/15=1/25(4)12:14=x:6/112/14=(x/6)/1x = 36/7