解方程0.7X+1/0.4-0.2X-1/.07=1

分类: 作业答案 • 2023-01-24 13:54:29

问题描述：

答

........

答

0.5x=1-1/0.4+1/0.7=-1/14
x=-1/7

答

0.7X+1/0.4-0.2X-1/.07=1
0.5X+10/4-10/7=1
0.5X=1-10/4+10/7
0.5X=-1/14
X=-1/7

答

0.7x+1/0.4-0.2x-1/0.7=1
0.7x-0.2x=1-1/0.4+1/0.7
0.5x=1-2.5+10/7=-1/14
x=-1/7