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Leokris [45]
3 years ago
8

Justin bought a calculafor and a binder that were both 15% off the original price. The original price of the binder was $6.20. J

ustin spent a total of $107.27. What was the original price of the calculator?
Mathematics
2 answers:
mash [69]3 years ago
5 0
6.20 x .15 = .93
6.20-.93= 5.27
107.27-5.27=102
102 x .15 = 15.3
102+15.3=117.3
$117.3
Viefleur [7K]3 years ago
5 0

Let

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

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

we know that

15\%= \frac{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

<u>the answer is</u>

the original price of the calculator is \$120

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