First draw a picture according to the meaning of the question, and then make assumptions, and set each fire truck on each line to send cars (A)x, Y, Z respectively; (B) l、m、n

Based on the above meanings and assumptions, we can draw the following conclusions:

x+y+z & lt； =8

l+m+n & lt； = 10

x+l=4

y+m=5

z+n=6

The topic is to find the minimum value of1* x+5 * y+6 * z+4 * l+3 * m+2 * n.

Then eliminate according to the above conditions, and finally find the minimum value.

Then the step size can be set to 1, and the minimum value can be obtained by programming.

In general, there are only a few initial conditions and a few independent variables, which should be used when you design the minimum algorithm above.