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How many people and flies in the room if there are 13 heads and 46 legs?
Wiki User
∙ 11y ago
Suppose there are P people and F flies.
Then 13 heads implies: P + F = 13
and 46 legs implies: 2*P + 6*F = 46
Sibtracting twice the first equation from the second gives:
4*F = 20 so that F = 5
and then P = 13 - F = 8
So 8 people and 5 flies.
Wiki User
∙ 11y ago
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