:x×(1-50%)=(1000-x)×(1-25%)
问题描述:
:x×(1-50%)=(1000-x)×(1-25%)
怎样
答
x×(1-50%)=(1000-x)×(1-25%)
0.5x=0.75(1000-x)
乘以4得 2x=3000-3x
5x=3000
x=600