1.x:3=0.75:1/10 2.7:8=x:56 3.x/1:1/3=1/15:1/5
问题描述:
1.x:3=0.75:1/10 2.7:8=x:56 3.x/1:1/3=1/15:1/5
答
1.x:3=0.75:1/10=0.75:0.1=7.5 =>x=22.5
2.7:8=x:56 =>x=7*56/8=49
3.x/1:1/3=1/15:1/5,将左边上下同时乘以3,右边上下同时乘以15,得到3x=1/3 =>x=1/9