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2 October, 04:04

Mongoose McHuffy has a bike shop. He only has bicycles and tricycles in stock. In total he has 21 items in stock with a total of 51 wheels. Can you tell Mongoose McHuffy how many bicycles and tricycles he has?

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  1. 2 October, 07:03
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    12 bikes

    9 tricycles

    Step-by-step explanation:

    x+y=21

    2x+3y=51

    x=-y+21

    2 (-y+21) + 3y=51

    -2y+42+3y=51

    y+42=51

    y=9

    x=12
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