x-40%x+4=80%怎么算
问题描述:
x-40%x+4=80%怎么算
答
原式可变为x-0.4x=0.8-4
0.6x=-3.2
x=6分之32
答
x-40%x+4=80%
100X-40X+400=80(两边同乘100)
60X=-320(移项)
X=-16/3
答
x-40%x+4=80%
x-0.4x+4=0.8x
0.2x=4
x=20