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If you have 95 ducks and goats with 316 legs total how many of each kind do you have?
Suppose there are x ducks and y goats.
Then total number of creatures is 95 so that x + y = 95
and total number of legs = 2x + 4y = 316
Multiply the first equation by 2 and subtract from the second:
0x + 2y = 126 so that y = 63
and then, by the first equation, x + 63 = 95 so that x = 32.
What else can I help you with?
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