1. **Stating the problem:** We have two equations based on the amounts of money made by selling items priced at $x$ and $y$ dollars.
Given:
$$9x + 2y = 36.05$$
$$7y + 5x = 48$$
We need to find the values of $x$ and $y$.
2. **Formula and approach:** This is a system of linear equations. We can solve it using substitution or elimination.
3. **Step 1: Rearrange the first equation to express $y$ in terms of $x$:**
$$9x + 2y = 36.05 \implies 2y = 36.05 - 9x \implies y = \frac{36.05 - 9x}{2}$$
4. **Step 2: Substitute $y$ into the second equation:**
$$7y + 5x = 48$$
Substitute $y$:
$$7 \times \frac{36.05 - 9x}{2} + 5x = 48$$
5. **Step 3: Simplify and solve for $x$:**
$$\frac{7}{2}(36.05 - 9x) + 5x = 48$$
$$\frac{7}{2} \times 36.05 - \frac{7}{2} \times 9x + 5x = 48$$
$$126.175 - 31.5x + 5x = 48$$
$$126.175 - 26.5x = 48$$
6. **Step 4: Isolate $x$:**
$$-26.5x = 48 - 126.175$$
$$-26.5x = -78.175$$
$$x = \frac{-78.175}{-26.5} = 2.95$$
7. **Step 5: Substitute $x$ back to find $y$:**
$$y = \frac{36.05 - 9 \times 2.95}{2} = \frac{36.05 - 26.55}{2} = \frac{9.5}{2} = 4.75$$
**Final answer:**
$$x = 2.95, \quad y = 4.75$$
These are the prices of the items corresponding to $x$ and $y$.
Linear Equations 424029
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