20 is 20x, and this is the total price.
20% discount: the store should charge 20 times the price multiplied by 0.8.
As a result, it was only cheaper 1.6.
So the final formula should be: 20x-20x * 0.8 = 1.6 or written.
20x * ( 1 - 0.8)= 1.6
Final results
x=0.4
The country is rich and strong, and the people are duty-bound. We should all open our eyes and guide the people to the light.
It makes people angry! T