farmer raises chickens and cows

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farmer raises chickens and cows

by sanju09 » Sat Oct 15, 2011 3:55 am
A farmer raises chickens and cows. If his animals have a total of 120 heads and a total of 300 feet, how many chickens does the farmer have?
(A) 50
(B) 60
(C) 70
(D) 80
(E) 90
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by sl750 » Sat Oct 15, 2011 4:12 am
x- chicken; y- cow

x+y=120 ----- 1
2x+4y=300 ----- 2

Solving we get x=90 chicken