因为两方程组的解相同，所以对于x，y，满足四个方程，所以重新联立方程组

• 9x+2my=4                       y=-1/m  

  6x-3my=7                       x= 2/3                            m=5/4

• 3nx-3y=5                        y=n/4-9/8                      n=13/10

  6nx+2y=2n+1                 x=13/24n+1/4