Question

Justin bought a calculafor 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

Let

x-----> the original price of the calculator

y-----> the original price of the binder

we know that

`15\%= (15)/(100)=0.15`

`(x+y)(1-0.15)=107.27`

`(x+y)(0.85)=107.27` -----> equation A

`y=6.20` -----> equation B

substitute the value of y in the equation A and solve for x

`(x+6.20)(0.85)=107.27`

`(x+6.20)=(107.27/0.85)`

`x=(107.27/0.85)-6.20`

`x=126.20-6.20`

`x=\$120`

therefore

the answer is

the original price of the calculator is
`\$120`