Posted by **ANITA** on Wednesday, January 23, 2008 at 7:57pm.

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 -
**sarah**, Wednesday, January 23, 2008 at 8:02pm
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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