First, calculate the price of the binder after discount. Then, call the original price of the calculator x and try to form an equation.
$120
Practice makes perfect
We are told that Justin bought a binder and a calculator that were both 15 % off the real price and spent a total of $107.27. We are asked to find the original price of the calculator knowing that the original price of the binder is $6.20. Let's call the original price of the calculator x.
x=Original price of the calculator
Since the discount was 15 % , Justin paid x dollars for the calculator minus the discount.
Discounted Calculator:x-15 % * x
Similarly, Justin paid $6.20 for the binder minus the discount, which is equal to 15 % * $6.20.
Discounted Binder:6.20-15 % * 6.20
In total, Justin spent $107.27. We can write the following equation.
Disc. Calculator+ Disc. Binder=107.27
⇕
x-15 % * x+ 6.20-15 % * 6.20=107.27
Let's try to solve this equation!
