Question

Justin bought a calculator and a binder that were both 15% off the original price. The original price of the binder was $6.20. Justin spent a total of $107.27. What was the original price of the calculator?

Answer 1

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Answer:

$120

Explanation:

Let c represent the original price of the calculator. Then the amount Justin spent was ...

(6.20 +c)(1 -0.15) = 107.27

6.20 +c = 107.27/0.85 . . . . . divide by the multiplier on the left

c = 126.20 -6.20 . . . . . . . . . . subtract 6.20

c = 120

The original price of the calculator was $120.