80/x=2.5×80/(x+2.5)如何解
问题描述:
80/x=2.5×80/(x+2.5)如何解
答
80/x=2.5×80/(x+2.5)
1/x=2.5/(x+2.5)
2.5x=x+2.5
1.5x=2.5
x=5/3