After playing football, two students studied the number of black and white blocks in football. They found that black blocks were Pentagon, white blocks were hexagon, and black and white, white blocks were more. They output 12 black blocks, but the number of white blocks was different. Can you use the equation to help them solve this problem It's tonight~

After playing football, two students studied the number of black and white blocks in football. They found that black blocks were Pentagon, white blocks were hexagon, and black and white, white blocks were more. They output 12 black blocks, but the number of white blocks was different. Can you use the equation to help them solve this problem It's tonight~

There are 20 white pieces~
The shape of a football is like this:
The Pentagon is surrounded by hexagons, and each hexagon has only three sides that coincide with the Pentagon (because it is a football, it has a fixed shape, so this condition can be regarded as known). Therefore, the number of sides of the hexagon is twice that of the Pentagon
6*x=2*5*12
So, x = 20