SOLUTION: The Method of Substitution 5. On Derwin farm there is a total of 50 chickens and cows.If there are 118 legs, how many chickens are there? Can you please help with this question?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: The Method of Substitution 5. On Derwin farm there is a total of 50 chickens and cows.If there are 118 legs, how many chickens are there? Can you please help with this question?      Log On


   

Question 184794: The Method of Substitution
5. On Derwin farm there is a total of 50 chickens and cows.If there are 118 legs, how many chickens are there?
Can you please help with this question??
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
CHICK+COWS=50
CHICKENS=50-COWS.
2CHICKENS+4COWS=118
2(50-COWS)+4COWS=118
100-2COWS+4COWS=118
2COWS=118-100
2COWS=18
C0WS=18/2
COWS=9 ANS.
CHICKENS+9=50
CHICKENS=50-9
CHICKENS=41 ANS.
PROOF:
2*41+4*9=118
82+36=118
118=118