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**With Rational Functions**

Solving Word Problems With Rational Functions

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**Minds On Page 287 #11 Basic premise**

Selling price - cost price = profit R(x) - C(x) = P(x)

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**Setting it up Determine the cost per book**

Let x represent the number of books she purchased. The cost per book will be

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**Setting it up She gives 15 to her brother and sells the rest for $330**

Her revenue per book will be 330 x-15

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**Equation Revenue - Cost = Profit R(x) - C(x) = P(x)**

330/x /x = 1.5 Solve for x to determine the number of comic books in the box. Substitute this answer into the cost expression to get the original price of each book.

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Additional Example 1: Solving Equations That Contain Like Terms

Additional Example 1: Solving Equations That Contain Like Terms

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