Respuesta :
If x is air carriers and y is land carriers, the answer would be 1500x + 1800y < 150000, x + y < 150. If x is land and y is air, the answer would be 1800x + 1500y < 150,000, x + y <150.
1800x+1500y greather than or equal to 150,000 x+y greather than or equal 150