5X+3Y=240 (1)
3X+5Y=190 (2)
相加
8X+8Y=430
X+Y=53.75
5X+5Y=268.75 (3)
(3)-(1)
2Y=28.75
Y=14.375
(3)-(2)
2X=78.75
X=39.375
X=39.375,Y=14.375
5X+3Y=240 (1)
3X+5Y=190 (2)
相加
8X+8Y=430
X+Y=53.75
5X+5Y=268.75 (3)
(3)-(1)
2Y=28.75
Y=14.375
(3)-(2)
2X=78.75
X=39.375
X=39.375,Y=14.375