-You have $100 to buy 100 animals. If:
(Buy at least one of each)
Assuming:
What is te value of: F + P - C
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We are given that $C+P+F=100$ and $10C+3P+\frac{F}{2}=100$ . Eliminating $F$ gives $19C+5P=100$ . Since $19C$ must be divisible by 5, we have $C=5, P=1, F=94$ . The answer is $\boxed{90}$