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4 February, 08:05

In a shop, there are 25 bicycles and tricycles. there are 63 wheels in all. find the numbers of bicycles and tricycles in the shop.

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  1. 4 February, 10:17
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    let x be number of bicycles

    and y the number of tricycles

    So

    x + y = 25 equation 1

    The number of wheels is

    2x + 3y = 63 equation 2

    We can multiply the equation 1 by two and subtract from the second one ...

    2x + 3y = 63

    - (2x + 2y = 50)

    then

    y = 13 trikes and

    x = 12 bikes
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