Answer:
$19 is the original price
Explanation:
Step 1: Make an equation
A store has 20% off sale on pants. With this discount, the price of one pair of pants before tax is $15.20.
n is the total price, 0.2n is the discount: n - 0.2n
n - 0.2n = 15.20
Step 2: Combine like terms
n - 0.2n = 15.20
0.8n = 15.20
Step 3: Divide both sides by 0.8
0.8n / 0.8 = 15.20 / 0.8
n = 19
Answer: $19 is the original price