Farmer Deanna looks out her window and counts a total of 64 legs on a total of 20 animals. If she has only sheep and chickens, how many of each does she have?

Question

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Answer 1

Assuming 'S' number of sheep and 'C' number of chicken, we get:

 

4S + 2C = 64, and S + C = 20

 

Two unknowns, two equations. Solve:

 

C = 8, S = 12