0.75:X=0.8:3.4

问题描述:

0.75:X=0.8:3.4

答案是x=3.1875

根据内项积=外项积得:
0.8x=2.55
x=3.1875

0.75:X=0.8:3.4
0.8X=0.75×3.4
0.8X=2.55
X=3.1875