Question 385315
Peter is outside looking at pigs and chickens in the yard. He comes inside, tells Nadia that he counted 13 heads and 36 feet, and asks her how many pigs and chickens were in the yard. what should Nadia tell him?
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pig =x
chickens=y
x+y=13 heads..............1
4x+2y=36...................2
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multiply 1 by -2
-2x-2y=-26
add to 2
4x-2x+2y-2y=36-26
2x=10
/2
x= 5 number of pigs
chickens qill be 8
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m.ananth@hotmail.ca