Answer:
$90
Step-by-step explanation:
Let $x be the initial price of the hat before being discounted.
If the store offers 20% discount on the price of hat, it will become;
20% of $x
If the discounted price is $18, then;
20% of $x = $18
20/100 of $x = $18
20x/100 = $18
20x = $1800
x = $1800/20
x = $90
Therefore the regular price of the hat is $90
