Problems with packing horse tiles: there are 100 watts, 100 watts, one big horse carries three watts, one middle horse carries two watts, and a pair of small horses carry 1 watt. Q: How many horses are there? (Hint: There are five answers)

Reference answer

Malaysia has X, China has Y and Pony has Z (obviously these three unknowns are all positive integers or 0).

Two equations can then be listed:

x+y+z= 100

3x+2y+z/2= 100

At the same time, we can get the range of three unknowns x, y and z, x, Y [0 0,50], z[0, 100].

Then the unknown number z is eliminated according to the above two equations.

5x+3y= 100

Divide the unknown into two sides of the equal sign

Y=( 100-5x)/3, the combination of X and Y is solved by iterative method, because both X and Y are positive integers or 0, so the combination is less, as follows:

x=2，y=30

x=5，y=25

x=8，y=20

x= 1 1，y= 15

x= 14，y= 10

x= 17，y=5

x=20，y=0

Bringing the above combination into the previous equation,

You can get z:

x=2，y=30，z=68

x=5，y=25，z=70

x=8，y=20，z=72

x= 1 1，y= 15，z=74

x= 14，y= 10，z=76

x= 17，y=5，z=78

x=20，y=0，z=80