tolong yaa pake caranya:')

                sedan                  bus
jumlah          x                        y        < 250
Luas            6x                     20y      < 2900
Harga         8000x           10000y      = ?

  x +      y = 250      |x6 | 6x +   6y = 1500
6x + 20 y = 2900    |x1 | 6x + 20y = 2900 -                                   
                                            -14 y = -1400
                                                  y = 1400/14 = 100

x + y = 250
x + 100 = 250
x = 250 - 100 = 150

= 8000x + 10000y
= 8000(150) + 10000(100)
= 2.200.000