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ASAP!! 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?
Include all steps for branliest.

Respuesta :

Answer:   120 dollars

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Work Shown:

x = original price of the calculator

x+6.20 = original price of calculator and binder

0.85(x+6.20) = price after discount, see note below

0.85(x+6.20) = 107.27

Solving for x.

0.85(x+6.20) = 107.27

0.85x+0.85*6.20 = 107.27

0.85x+5.27 = 107.27

0.85x = 107.27-5.27

0.85x = 102

x = 102/0.85

x = 120 dollars is the original price of the calculator

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Checking the answer:

Before the discount, Justin would pay 120+6.20 = 126.20 dollars for the calculator and binder. He saves 15%, which means he saves 0.15*126.20 = 18.93 dollars and the final price would be 126.20-18.93 = 107.27 which matches up with the value in the instructions.

Or a shortcut would be 0.85*126.20 = 107.27 and that confirms the answer as well.

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note: If Justin saves 15% then he pays the remaining 85% (since 15+85 = 100). So that's why there's a 0.85

semsee45

Answer:

Original price of the calculator = $120

Step-by-step explanation:

Given:

  • Original price of the binder = $6.20

If the original price of the binder was reduced by 15%, then the sale price is 85% of the original price (since 100% - 15% = 85%).

[tex]\begin{aligned}\implies \textsf{Sale price of the binder}& = \sf 85\% \;of\; \$6.20\\&= \sf 0.85 \times \$6.20\\&= \sf \$5.27\end{aligned}[/tex]

If Justin spent a total of $107.27:

[tex]\begin{aligned}\implies \textsf{Sale price of the calculator}&= \sf Total\;spent-Sale\;price\;of\;the\;binder\\ & = \sf \$107.27 - \$5.27 \\ & = \sf \$102.00\end{aligned}[/tex]

Remembering that the sale price of the calculator is 85% of its original price:

[tex]\begin{aligned}\implies \sf 85\% \; \textsf{of original price}&=\sf \$102.00\\\sf 0.85 \times original \; price &=\$102.00\\\sf Original \; price & = \sf \$102.00 \div 0.85\\\sf Original \; price &= \sf \$120.00\end{aligned}[/tex]

Therefore, the original price of the calculator was $120.

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