在变化万千的方程组中,只要留心观察,你就会发现有些未知数的系数之间隐含着极其美妙的关系,这些方程组,倘若仅机械地运用代入或加减消元法去解答,可能会给你带来许多困惑和烦恼.比如,解方程组,按常规的加减或代入消元法去解,不甚简洁,但只要仔细观 In the ever-changing system of equations, as long as you look closely, you will find that there is an extremely wonderful relationship between the coefficients of some unknown numbers. If these equations are only mechanically applied to the substitution or addition and subtraction elimination method, It may give you a lot of confusion and annoyance. For example, to solve the equations, according to the conventional addition and subtraction or substitution into the elimination method to solve, not very concise, but as long as careful view