4×37.5％-4x＝2分之1解方程 4×37.5％-4x＝2分之11.5-4x=0.54x=1.5-0.54x=1x=4分之1
4*37.5％-4x＝1/21.5-4x=1/24x=1x=1/4
4x3/8-4X=1/2解3/2-4X=1/23/2=1/2+4X1=4XX=1/4
4×0.375-4x=0.54x=4×0.375-0.54x=1x=1/4
