Question

x:3又2分之1=(1-4x):2又3分之1

Answer 1

x/(3+1/2)=(1-4x)/(2+1/3)x/(7/2)=(1-4x)/(7/3)2x/7=3(1-4x)/72x=3(1-4x)2x=3-12x14x=3x=3/14夏装每件亏百分之20,夏装每件成本*80%=180,夏装每件成本=180/0.8=225,每件亏：225-180=45秋装每件赚百分之20,秋装每件成...