In a sale, the normal price of a shirt is reduced by 20%. The sale price of the shirt is 8 robux. Work out the normal price of the shirt.
Let's say the normal price of the shirt is x robux.
To find the sale price, we need to reduce the normal price by 20%, or multiply it by (100% - 20%) = 80% = 0.8.
So, the sale price of the shirt is 0.8x robux.
We are given that the sale price is 8 robux. So, we can set up the equation:
0.8x = 8
Solving for x, we divide both sides of the equation by 0.8:
x = 8 / 0.8 = 10
Therefore, the normal price of the shirt is 10 robux.