数学题：甲袋中的巧克力是乙袋中的五倍，如果从甲袋中拿走17块巧克力，并在乙袋中放入7块巧克力，这时甲、乙两袋巧克力块数相等，那么乙袋中原有多少块巧克力？（用方程解答。由“殇沬夕琳熏”同学提问）

数学题解答：

解：设乙袋中的巧克力是x块。
根据“这时甲、乙两袋巧克力块数相等”来列出方程。
5x-17=x+7
4x=24
x=6
答：乙袋中原有6块巧克力。

推荐阅读：
How to Count the Distinct Pairs using HashMap?　 Blogger Jailed For Pokemon Go Gets Even More Trouble　 Dead Simple Ways to Keep Your Best Blogging Ideas From Slipping 　 The Fear of Blogging is Real – Here’s How to Overcome It　 Influential Cybersecurity Blogger Gets Digitally Attacked　 Building Relationships with Your Influencers　 Authorities In Vietnam Arrest Top Blogger For One Criticizing Co　 The Top Health Bloggers You Should Be Following　 Mashable Blogger: Owning a Samsung Galaxy Note 7 is Safer Than G　 5 Ways to Earn Money from Your Website