Tolong jawab secepatnya dengan caranya

a = mobil, b= motor
*a+b ≤ 25
*7000 a + 4000b ≤ 133.000
7a + 4b ≤ 133

a+b ≤ 25        | x7 | 7a + 7b ≤175
7a + 4b ≤133 | x1 | 7a + 4b ≤ 133
                              -------------------  -
                                        3b ≤ 42
                                          b = 14

a+b ≤ 25
a +14 = 25
a = 25-14
a= 11

Keuntungan maksimum
3000a + 1500b
3.000 (11) + 1500(14)
33.000 + 21.000 = 54.000