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6 March, 03:13

At a bicycle shop, a bicycle costs $49 and a tricycle costs $27. An after-school club buys bicycles and tricycles with a total of 39 wheels. The club buys 2 more bicycles than tricycles. a. How many bicycles does the club buy?

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  1. 6 March, 05:57
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    Let b for the number of bicycles, and t for the number of tricycles.

    2b+3t=39 (a bicycle has 2 wheels and a tricycle has 3 wheels)

    b=t+2 = >t=b-2

    substitute b for t: 2b+3 (b-2) = 39

    2b+3b-6=39

    5b=45

    b=9

    the club buys 9 bicycles and 7 tricycles.
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