答:X=1/10=0.1
解题如图:
3/2:1/5=3/4:x解:3/2×x=1/5×3/43/2x=3/20x=3/20÷3/2x=1/10
解比例解:3/2:1/5=3/4:xx=1/5x3/4÷3/2x=3/20÷3/2x=1/10