An engineering team wants to recruit people.

Set up positions A and B to recruit X and Y people respectively.

x+y= 150

2y & gt= x & gty

Total monthly salary m = 600x+800y = 600 (x+y)+200y = 600 *150+200y. In other words, the fewer type B workers, the less total wages they pay.

When x=2y, that is, x= 100 y=50, the salary is paid at least.