SOLUTION: Sal raises pigs and chickens. She has 420 creatures, with a total of 1240 legs. How many pigs does Sal raise?

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Question 82926: Sal raises pigs and chickens. She has 420 creatures, with a total of 1240 legs. How many pigs does Sal raise?
Answer by stanbon(75887) About Me  (Show Source):
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Sal raises pigs and chickens. She has 420 creatures, with a total of 1240 legs. How many pigs does Sal raise?
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Let number os pigs be "x" ; number of legs is 4x
Number of chickens is "420-x" ; number of legs is 2(420-x)=840-2x
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EQUATION:
legs + legs = 1240 legs
4x +840-2x = 1240
2x = 400
x = 200 (this is the number of pigs)
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Cheers,
San H.