Question 466705
A man bought some tools for a total amount of P90,000. If he had bought 50 more tools, it would have cost him P20 less per piece. How many tools did he buy?
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Let the original number of tools he bought be "x".
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Average cost per tool = 90,000/x
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Average cost if he had bought 50 more would be
90,000/(x+50)
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Equation:
[(90000/x)-(90000/(x+50)] = 20
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90000*50 = 20x(x+50)
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x^2+50x -225000 = 0
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x = 450 (original # of tools purchased)
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Cheers,
Stan H.
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