5X * 100*2/5 + 4X * 100* 3/5 = 100*4.4方程怎么解
问题描述:
5X * 100*2/5 + 4X * 100* 3/5 = 100*4.4方程怎么解
答
5X * 100*2/5 + 4X * 100* 3/5 = 100*4.4
200X+240X=440
440X=440
X=1