Contact us
Choose a category below so we can get back to you as quickly as possible.
設三角形是x,正方形是y,轉化成兩個二元一次方程: x-y+x-y=72,x-y-y=27 解得x=45,y=9
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.