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Harry purchased 18 hinges for his kitchen project. They were each on sale for $4 off the regular price. The total cost of the hinges was $90. What was the regular price for each hinge?

Respuesta :

Answer:  $ 9

Step-by-step explanation:

Let the regular price of one hinge = x dollar,

After $ 4 off, the new price of one hinge = x-4 dollars

Thus, the price of 18 hinges = 18(x-4) dollars,

But, According to the question,

The price of 18 hinges = $ 90

⇒ 18(x-4) = 90

⇒  x-4 = 5

⇒  x = 9

Hence, the regular price of each hinge = $ 9