1.4X—0.6X=0.2 0.8X=0.2X=0.25够详细么?敢问楼主几年级?
0.8x=0.2x=0.25
X=0.25
解:原式=0.8x=0.2 x=0.25
1.4X—0.6X=0.2解: 0.8X=0.2 X=0.25