15/x-15/1.5x=0.25是怎么解得
问题描述:
15/x-15/1.5x=0.25是怎么解得
答
x=20
答
15/x-15/1.5x=0.25
15×1.5-15=0.25×1.5x
7.5=0.375x
x=20