实质追索我们在用一元一次方程解决实际问题的过程中发现,有些问题中需要求解的未知量可能不只一个,那个时候是没有办法解决的.遇到有多个未知量的实际问题,怎么办?现在我们找到了解决的办法,解决问题的基本思路就是“消元”.“消元”在具体操作时有不同的做法.具体地说,同一问 Recalling in real terms that we use the one-dimensional equation to solve practical problems, we find that there may be more than one unknown quantity that needs to be solved in some problems. There is no way to solve this problem at that time. What to do if there are practical problems with multiple unknowns? Now that we have found a solution, the basic idea of ​​solving the problem is to “eliminate the yuan.” “Elimination” has a different approach when it comes to specific operations. Specifically, the same question