SOLUTION: in a cage there are pigeons and rabbits of there are 20 heads and 48 feet, then how many rabbits are there ?

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Question 994039: in a cage there are pigeons and rabbits of there are 20 heads and 48 feet, then how many rabbits are there ?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
x=pigeons
y=rabbits
x+y=20
2x+4y=48
=======
2x+4y=48
-2x-2y=-40 (multiply it by -2)
2y=8
y=4 rabbits
x=16 pigeons
that is 20 heads and 4*4+16*2=48 as a check