x/72 +y/96=2 (1)x/72-y/96=1 (2)(1)+(2),得x/36=3解得:x=108将x=108代入(1)得y=48
x/72+y/96=2x/72-y/96=12x/72=3x=108y=48
72/x + y/96 =2 ①x/72 - y/96 =1 ②① + ②, 得:x/36 = 3解得:x = 108将x =108代入①得y = 48
48