a farmer saw some chickens and pigs in a field. he counted 30 heads and 84 legs. determine exactly how many chickens and pigs he saw

Question

use a picture, table, graph, substitution, and elimination

Answer 1

Let x = the number of chickens

Let y = the number of pigs

x + y = 30       x = 30 - y

2x + 4y = 84

2(30 - y) + 4y = 84

60 - 2y + 4y = 84

2y = 24

y = 12 pigs

x = 30 - 12 = 18 chickens