3/8X﹣37.5%X=1/8.20%X+1.2=4.75%﹣1/4X=12.5 解方程

问题描述:

3/8X﹣37.5%X=1/8.20%X+1.2=4.75%﹣1/4X=12.5 解方程

3/8X﹣3/8X=1/8
(无解)37.5%=0.375=3/8
20%X+1.2=4
0.2x+1.2=4
0.2x=2.8
x=14
75%﹣1/4X=12.5
0.75﹣1/4X=12.5
﹣1/4X=12.5- 0.75
﹣1/4X=11.75
X=-47