X/10-x/25=0.9
问题描述:
X/10-x/25=0.9
答
X/10-x/25=0.9 两边乘100
10x-4x=90
6x=90
x=15
X/10-x/25=0.9
X/10-x/25=0.9 两边乘100
10x-4x=90
6x=90
x=15