1/x+1/y=1/24 20/x+40/y=1令a=1/x,b=1/y那么原方程组可化为：a+b=1/24 (1)20a+40b=1(2)(1)×120-(2)×3,得：(120a+120b)-(60a+120b)=5-360a=2a=1/30代入(1),得：b=1/24-1/30b=1/120解得：a=1/30b=1/120则：x=1/a...