SOLUTION: farmer raises pigs & chickens. He has 220 animals with a total of 700 legs. How many pigs does the farmer have?

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Question 332690: farmer raises pigs & chickens. He has 220 animals with a total of 700 legs. How many pigs does the farmer have?

Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
Let's have p represent pigs and c show chickens. Now we can set up 2 equations as:
p + c = 220
4p + 2c=700
Now multiply the first equation by -2 to get:
-2p-2c=-440
Add this to the second equation to get:
2p=260
Divide by 2 to get:
p=130
There we go, there are 130 pigs.
Make sense?
RJ
www.math-unlock.com