(5x-1/0.3)-(3x-1.2/0.2)=1.6
问题描述:
(5x-1/0.3)-(3x-1.2/0.2)=1.6
答
(1)如果分子分别是5x-1,3x-1.2则
[10×﹙5x-1﹚]/﹙10×0.3﹚-[10×﹙3x-1.2﹚]/﹙10×0.2﹚=1.6
(50x-10)/3-(30x-12)/2=1.6(再去分母,方程两边同时乘以6)
100x-20-90x+36=9.6
10x=-6.4
x=-0.64