MATH

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PIGS HAVE 4 LEGS - CHICKENS HAVE 2 EACH ... IF YOU HAVE A TOTAL OF 50 LEGS ON 18 TOTAL ANIMALS HOW MANY CHICKENS AND HOW MANY ARE PIGS?

  • MATH -

    Let C=number of chickens and P=number of pigs
    1. C+P=18
    2. P=18-C (isolate a variable)
    3. 2C+4P=50 (Each chicken has two legs, each pig has four legs, and adds up to 50 legs).
    4. 2C+4(18-C)=50) Substitute 18-C for P because step 2 shows P=18-C.
    2C+72-4C=50
    72-2C=50
    -2C= -22
    C=11

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