解方程 7x-1/0.24=1-0.2x/0.18-5x+1/0.12

分类: 作业答案 • 2021-12-19 16:53:14

问题描述：

答

7x-1/0.24=1-0.2x/0.18-5x+1/0.12
7X- 25/6 =1- 10X/9 -5X +25/3
18·7X-25×3=18-2·10X-18·5X+25×6
126X-75=18-20X-90X+150
236X=243
X=243/236

答

7x-1/0.24=1-0.2x/0.18-5x+1/0.12
7x-1÷6/25=1-10x/9-5x+25/3
7x+10x/9+5x=25/6+1+25/3
118x/9=81/6
x=81/6*9/118
x=243/236