Решение линейных уравнений и систем линейных уравнений                                а)2x-5y=0                                 6x+y=0                              б)5x+y=30                                 3x-4y=41             ...

Решение линейных уравнений и систем линейных уравнений                                а)2x-5y=0                                 6x+y=0                              б)5x+y=30                                  3x-4y=41                               в)3a-2b=6                                  a-4b=6                              г)3u-4v=2                               9u-5v=7                                                                                                                                                                  д)6m-9n=-4                                   2m+5m=4                              е)5y+8z=21                                    10y-3z=-15