Current location - Training Enrollment Network - Mathematics courses - Super-difficult problem of junior high school mathematics
Super-difficult problem of junior high school mathematics
(1) Set X yuan for computer and Y yuan for desk.

10x+200y=90000

12x+ 120y=90000

Solution: x=6000, y= 150.

(2)

Set up a computer and B desk.

6000 * 0.9a+ 150 * 0.8b = 270000

a≥35

a=35,b=675

a=36,b=630

A=37, b=585 (obsolete)

So there are only the above two schemes.