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12 December, 21:32

7 T-shirt's and a hat costs £67.00 5 T-shirt's and a hat costs £49.00 how much does a t shirt cost?

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  1. 12 December, 23:21
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    T shirt = £9

    Hat = £5

    Step-by-step explanation:

    1)

    Let cost of T-shirt be x

    7x + y = 67

    y = 67 - 7x

    2)

    5x + y = 49

    Substituting

    5x + (67-7x) = 49

    67 - 2x = 49

    -2x = - 18

    x = 9

    To find y

    7x + y = 67

    7*9 + y = 67

    y = 68-63 = 5
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