12:60.14:2.5 比值 x:2.5=0.8 6.9:x=0.3

问题描述:

12:60.14:2.5 比值 x:2.5=0.8 6.9:x=0.3
12:60.14:2.5 比值 x:2.5=0.8 6.9:x=0.3 5/6:x=3/2 未知项

x:2.5=0.8 x=2
6.9:x=0.3 x=23
5/6:x=3/2 x=5/9