Question

Blue Tide Swim Shop is having its annual summer sale, when every item in the store gets marked down. During the sale, rashguards sell for $5 less than full price. Miguel purchases 3 rashguards and pays a total of $60.

Which equation can you use to find how much money, f, each rashguard costs at full price?
How much does each rashguard cost at full price?

Answer 1

Original price be x

Discount price be y

The equation is

• y=x-5

So

• y=3(x-5)
• 60=3x-15
• 3x=75
• x=25$

Answer 2

3(f - 5) = 60

$25

Explanation:

Let f = full price of rash-guard

Given:

• during the sale, rash-guards sell for $5 less than full price
• cost of 3 rash-guards during sale is $60

Therefore, the equation you can use to find how much money each rash-guard costs at full price is:

3(f - 5) = 60

To calculate the full price of the rash-guard, solve the equation for f:

⇒ 3(f - 5) = 60

Expand:

⇒ 3f - 15 = 60

Add 15 to both sides:

⇒ 3f = 75

Divide both sides by 3:

⇒ f = 25

Therefore, the full price of each rash-guard is $25.