设甲的钱数是x元,乙的钱数是y元,则：y/(x+y)=0.25 (1)(x-20)/(y+20)=5/3 (2)y=0.25(x+y)y=0.25x+0.25yx=3y 代入(2)(3y-20)/(y+20)=5/33y-20=(y+20)5/33y-20=y*5/3+100/3y=40x=3y=120甲乙两人共有人民币160元....����ʽ20�£� 75% - 5/8��һ��ĵ��?�����������䡣���һ��