pertidaksamaan x+2y=16 dan 3x-y=12

Diket           Eliminasi y       maka
 x + 2y =16    [x3]     3x + 6y = 48
 3x -  y = 12   [x1]     3x - y    = 12
                                  __________-
                                          7y = 36
                                            y = 5,14
 
y = 5,14 --->         x + 2y = 16
                     x + 2(5,14) = 16
                       x + 10,28 = 16
                                    x = 16 - 10,28
                                    x = 5,72