10

来源: 于 2012-09-01 19:06:54 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

(1) HE＊EG＝FE＊ED   =>  y*sqrt(x)=5*x

(2) AD＊AF＝AB＊AC  =>3*(8+x)=x*(5+x) . Solve x=4.

Solve (1) y=10