Math
posted by Jack .
There are 12 animals in a farm.some are cows the rest are chickens.there are 28 animals legs in all.how many cows are there? how many chickens are there ?

Math 
Reiny
cows  x
chickesn  y
x+y = 12 **
4x + 2y = 28 or 2x + y = 14 ***
subtract ** from ***
x = 2
then y = 10
2 cows and 10 chicks
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