解方程:70%x+(70%x-2)=(x+130%x-2)×60%
问题描述:
解方程:70%x+(70%x-2)=(x+130%x-2)×60%
答
70x+70x-200=60x+78x-120
2x=80
x=40
望采纳O(∩_∩)O哈哈~
答
70%x+(70%x-2) =(x+130%x-2)×60%
0.7x+(0.7x-2) = (x+1.3x-2)x0.6
1.4x-2=0.6x+0.78x-1.2
1.4x-0.6x-0.78x=2-1.2
0.02x=0.8
x=40
答
70%x+(70%x-2)=(x+130%x-2)×60%
0.7x+0.7x-2=(x+1.3x-2)×0.6
1.4x-2=1.38x-1.2
0.02x=0.8
x=40