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列方程组解应用题时,往往需要增设间接未知数,有时运用设而不求,整体求解的解题策略,常会收到事半功倍的效果.现举例如下:
When solving the equations of a list of equations, it is often necessary to add indirect unknowns. Sometimes the use of designing is not required. The solution strategy of the overall solution will often receive a multiplier effect. Examples are as follows: