数学题：某工厂有工人1200名，因工作需要，调走男工人的1/8，又新招女工人30名，这时男工人和女工人的人数相等，这个工厂原有男工人多少名？

数学题解答：

用方程解答比较简单，设原有男工人x名。女工人可以表示为（1200-x）。根据“这时男工人和女工人的人数相等”列出方程：

(1 – 1/8)x=1200-x+30

7/8 x = 1230-x

15/8 x = 1230

x = 656

答：原有男工人656名。

推荐阅读：
3 Things the Most Successful Pieces of Content Have in Common　 Social Media and Law Enforcement　 Paid Blogging Tools to Stake Your Lives on　 5 Places to Get Content Creation Ideas From　 3 Useful Free Online Courses for Bloggers You Should Consider Ta　 Running Your Email Marketing: Dedicated Platform or Gmail-Based 　 How Engaged Is Your Brand? [Infographic]　 Why the Speed of Your Site Should Be a Priority　 The Most Destructive Viruses of All Time　 Popular Websites You Didn’t Know Started as Blogs