1. **State the problem:** Solve the system of linear equations for part (a):
$$6x + 12y = -6$$
$$3x - 2y = -27$$
2. **Choose a method:** We will use the substitution or elimination method. Here, elimination is convenient.
3. **Eliminate one variable:** Multiply the second equation by 6 to align coefficients of $x$:
$$6 \times (3x - 2y) = 6 \times (-27)$$
$$18x - 12y = -162$$
4. **Add the first equation and the new equation:**
$$6x + 12y = -6$$
$$18x - 12y = -162$$
Add:
$$6x + 12y + 18x - 12y = -6 - 162$$
$$ (6x + 18x) + (12y - 12y) = -168$$
$$24x + 0 = -168$$
$$24x = -168$$
5. **Solve for $x$:**
$$x = \frac{-168}{24}$$
$$x = \cancel{\frac{-168}{24}} = -7$$
6. **Substitute $x = -7$ into the second original equation:**
$$3(-7) - 2y = -27$$
$$-21 - 2y = -27$$
7. **Solve for $y$:**
$$-2y = -27 + 21$$
$$-2y = -6$$
$$y = \frac{-6}{-2}$$
$$y = 3$$
**Final answer:**
$$x = -7, \quad y = 3$$
This completes the solution for part (a).
Linear Equations C133Ab
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