SOLUTION: A merchant can sell all of her calculators at a list price for $180. If she had 3 more calculators, she could sell each one for $10 less and still receive $180. Find the list price

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Question 255218: A merchant can sell all of her calculators at a list price for $180. If she had 3 more calculators, she could sell each one for $10 less and still receive $180. Find the list price of each calculator.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
p*c=180
c=180/p
180=(p-10)*(180/p+3)
p=30 list price
c=6 calculators
20*9=180