点斗悉击图轿卖片浏览闭销逗
x/埋没y=7/3 3X=7Y X=7/3 Y代入那个式虚码子得出: x/弯誉纳x+y=7/10
(x+y)/x=1+y/x=1+3/7=10/7所以x/(x+y)=7/10
x/y=7/拦散3x=7y/3x/掘衡氏x+y=7y/3÷(7y/判散3+y)=7y/3÷10y/3=7/10
x/y=7/3 3X=7Y X=7/3 Yx/ x+y=7/10