Michael breeds chickens and ducks Last month he sold 50 chickens and 30 ducks for $550 This month he sold 44 chickens and 36 ducks for $532 How much does a chicken cost and how much does a duck cost

Answer 1

50c+30d = 550

divide by 10

5c +3d = 55

15c +9d = 165

44c+36d =532

11c + 9d = 133

subtract bottom of last 2 groups to get

4c = 32

c = 32/4 = $8 per chicken

3d = 55-5c = 55-40=15

d = 15/3 = $5 per duck

(c,d) = ($8, $5)