方程組的解是　　　　　　．                                          ...

問題詳情：

方程組的解是　　　　　　．                                               

【回答】

　．                                                                                  

【考點】解二元一次方程組．                                                                  

【專題】計算題；一次方程（組）及應用．                                             

【分析】方程組利用加減消元法求出解即可．                                         

【解答】解：，                                                                

①+②得：﹣2x=4，即x=﹣2，                                                                

①﹣②得：2y=2，即y=1，                                                                      

則方程組的解為，                                                                      

故*為：                                                                           

【點評】此題考查瞭解二元一次方程組，利用了消元的思想，消元的方法有：代入消元法與加減消元法．                    

知識點：消元 解二元一次方程組

題型：填空題