SOLVE THIS PUZZLE, PROVE YOU ARE A GENIUS!

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A farmer of chickens and cows has a total of 30 animals with 74 legs between them. (All of the animals have the full complement of legs.) How many chickens does the farmer have?

Comments

  1. Jerry ObiNovember 28, 2014 at 6:49 PM

    4(a) + 2(b) = 74
    a+b=30

    4(30-b)+2(b)=74
    120-4b+2b=74
    120-74=4b-2b
    2b=46
    b=23 (Chickens)

    Solve for a
    4(a)+2(30-a)=74
    4a+60-2a=74
    4a-2a=74-60
    2a=14
    a=7 (cows)

    ReplyDelete

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