24/(x+y)+24/(x-y)=7/3,8/(x+y)+18/(x-y)=4/3

24/(x+y)+24/(x-y)=7/3,8/(x+y)+18/(x-y)=4/3

8/(x+y)+18/(x-y)=4/3で、両側に3を掛けて
24/(x+y)+54/(x-y)=4
両辺から
24/(x+y)+24/(x-y)=7/3
やる
30/(x-y)=5/3
だからx-y=18
代入
8/(x+y)+18/(x-y)=4/3
x+y=24
x=21,y=3
ありがとう採用^_^