x+y=6

4x+y & gt； = 15

x+3y & gt； =8

Solution 3

The possible combination is 3 3; 4 2; 5 1 。 . . This is the answer you want. Oh, three kinds.

Here is what the extension told you.

Calculate with

The corresponding freight is 500*3+400*3=2700.

500*4+400*2=2800

500*5+400* 1=2900

So the best plan is to rent three A-cars and three B-cars.

Exactly. If you don't understand anything, you can ask me O(∩_∩)O!