[(1又x28+20又47112)5-4又221*0.75]除以(13+57*14)[(4-2又23)*3=4.5 [(1+x28)+(20+47112)]5-(4+221)*0.75]÷{(13+10)[4-(2+23)]*3}=4.5 [(21+x28+47112)5-(4*0.75+221*0.75)]÷{(313)(12-6-2)}=4.5 215+x140+47560-3-1/14=4.5*3112 x140+9780=93/8 x140=938-9780=83380 x=(83380)*140=58314
