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26 May, 17:59

Lisa's barn has 20 animals that have 62 legs in total. She only has cows and geese. How many cows and how many geese does she have?

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  1. 26 May, 18:58
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    9 geese

    11 cows

    Step-by-step explanation:

    Say x is cows, and y is geese.

    x + y = 20 animals

    x * 4 + y * 2 = 62

    x = 20 - y

    (20 - y) * 4 + y * 2 = 62

    80 - 4y + 2y = 62

    - 2y = - 18

    y = 9 geese

    x = 20 - 9 = 11 cows
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