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15 May, 13:48

Jonathan needs two different kinds of socks for school. A pair of gym socks costs $3, and a pair of dress socks costs $5. If he spent a total of $50 on socks, how many of each type of socks did he purchase if the total number of pairs of sock is 12?

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  1. 15 May, 13:52
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    G + d = 12 ... g = 12 - d

    3g + 5d = 50

    3 (12 - d) + 5d = 50

    36 - 3d + 5d = 50

    -3d + 5d = 50 - 36

    2d = 14

    d = 14/2

    d = 7

    g + d = 12

    g + 7 = 12

    g = 12 - 7

    g = 5

    so he bought 5 pairs of gym socks (g) and 7 pairs of dress socks (d)
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