1. **State the problem:**
We are given a system of linear equations:
$$x + 5y = -13$$
$$3x + 5y = -4$$
We need to solve for $x$ and $y$.
2. **Write down the system:**
Equation 1: $x + 5y = -13$
Equation 2: $3x + 5y = -4$
3. **Subtract Equation 1 from Equation 2 to eliminate $y$:**
$$ (3x + 5y) - (x + 5y) = -4 - (-13) $$
$$ 3x + 5y - x - 5y = -4 + 13 $$
$$ (3x - x) + (5y - 5y) = 9 $$
$$ 2x + \cancel{5y - 5y} = 9 $$
$$ 2x = 9 $$
4. **Solve for $x$:**
$$ x = \frac{9}{2} $$
5. **Substitute $x = \frac{9}{2}$ into Equation 1 to find $y$:**
$$ \frac{9}{2} + 5y = -13 $$
6. **Isolate $y$:**
$$ 5y = -13 - \frac{9}{2} $$
$$ 5y = -\frac{26}{2} - \frac{9}{2} $$
$$ 5y = -\frac{35}{2} $$
7. **Divide both sides by 5:**
$$ y = \frac{-\frac{35}{2}}{5} = -\frac{35}{2} \times \frac{1}{5} = -\frac{35}{10} $$
$$ y = -\frac{7}{2} $$
**Final solution:**
$$ x = \frac{9}{2}, \quad y = -\frac{7}{2} $$
Linear Equations A2Fb03
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