(1种)设皮面为x,软面为y,x+y=10(1),6x+4y=50(2)x=10-y,(3)把3代入2得,6×(10-y)+4y=50.60-6y+4y=50,-2y=-10,y=5,把y=5代入1得5+x=10,x=5,(2种)(50-10×4)÷(6-4)=10÷2=5(是皮面)10-5=5(是软面)