Contact us
Choose a category below so we can get back to you as quickly as possible.
x+4=(40-x)-8 x+4=40-x-8 移項 x+x=40-8-4 合併同類項 2x=28 兩邊同除以2 2x÷2=28÷2 x=14
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.