1题5.8:X=3又1/2:7 二题.3/10*55-4X=14.5

问题描述:

1题5.8:X=3又1/2:7 二题.3/10*55-4X=14.5

1题5.8:X=3又1/2:7
5.8:x=0.5:1
0.5x=5.8
x=11.6
2题.3/10*55-4X=14.5
16.5-4x=14.5
4x=2
x=0.51题5.8:X=3又1/2:7 5.8:x=0.5:1为什么右边成了0.5:1了?化简比3又1/2:7=3.5:7=0.5:1