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Last weekend, I went to play in the nearby park. It was real fun! I rode my new bicycle that Mom had gifted me on my birthday. On reaching the park, I saw that there were a total of 8 bicycles and tricycles. If the total number of wheels was 20, how many tricycles were there?

  • Math -

    Let x = bikes and Y = trikes.

    X + Y = 8

    X = 8 - Y

    2X + 3Y = 20

    Substitute 8-Y for X.

    2(8-Y) + 3Y = 20

    16 - 2Y + 3Y = 20

    Y = 4

    I hope this helps. Thanks for asking.

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