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13 May, 18:04

Angel bought 3 pens and 4 pencils for $4.25. Nioka bought 2 pens and 6 pencils for $4.50. How much is a pen? and a pencil?

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  1. 13 May, 20:40
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    3x + 4y = 4.25 ➡️ equation 1

    2x + 6y = 4.5 ➡️ equation 2

    multiply equation 1 by 2

    6x + 8y = 8.5 ➡️ equ. 3

    multiply equation 2 by 3

    6x + 18 y = 13.5 ➡️ equ. 4

    by solving equation 3 and 4

    y = 0.5

    x = 0.75

    pens are for $0.5

    pencils are for $4.5
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