Old mcdonald had a farm in this fram he had 37 animals (chickens and pigs)

Question

Altogether, the animal had 98 legs. How many chickens and how many pigs are there?

Answer 1

number of chickens = x

number of pigs =y

 

x+y =37  , x=37-y

 

2x+ 4y = 98

 

2(37-y) +4y =98

74 -2y +4y =98

 

74 +2y =98

 2y = 24

y=12

 

x=37-12=25

 

number of chickens = x =25
number of pigs =y=12