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15 February, 12:49

The cost of five pencils and one pen is 2.50$, and the cost of one pencil and two pens is 1.85$. What is the cost of two pencils and one pen?

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  1. 15 February, 15:28
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    Let pc be pencils, and pn be pens. Then:

    5pc+pn=250

    pc+2pn=185

    Then

    10pc+2pn=500

    pc+2pn=185

    9pc=315

    pc=35

    pn=75

    Pencils are 35 cents; pens are 75 cents
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