4/x + 9/y =16/x + 6/y =1x =10,y =15
问题描述:
4/x + 9/y =1
6/x + 6/y =1
x =10,y =15
答
1/x + 1/y =1/6
4/x+4/y=2/3
4/x+9/y=1
5/y=1/3 y=15
1/x+1/15=1/6 x=10
x=10,y=15