列方程(组)解应用题在竞赛题中频频出现,但问题中往往涉及的已知量和未知量都比较多,等量关系也不容易找出.有时若能灵活分析题意,采用恰当的方法,就能起到事半功倍的效果.下面举几例说明. Column equations (group) solution problems often appear in the competition questions, but the problem often involves more known and unknown quantities, the equivalent relationship is not easy to find out sometimes flexible analysis of the problem can be used properly Method, you can play a multiplier effect. Here are a few examples.