0.4分之0.2X-1-3分之X+1=1 0.2X/0.4-1-X/3+1=1X/2-X/3=1X/6=1X=6
解:原式为: 0.2/0.4X-1-X/3=1 1/2X-1/3X=2 1/6X=2 X=12----------------------请采纳!