1. **State the problem:** Solve the system of linear equations:
$$-9x + 4y = -2$$
$$4x + 3y = -23$$
2. **Choose a method:** We will use the substitution or elimination method. Here, elimination is convenient.
3. **Eliminate one variable:** Multiply the first equation by 3 and the second by 4 to align coefficients of $y$:
$$3(-9x + 4y) = 3(-2) \Rightarrow -27x + 12y = -6$$
$$4(4x + 3y) = 4(-23) \Rightarrow 16x + 12y = -92$$
4. **Subtract the second from the first to eliminate $y$:**
$$(-27x + 12y) - (16x + 12y) = -6 - (-92)$$
$$-27x + 12y - 16x - 12y = -6 + 92$$
$$-43x = 86$$
5. **Solve for $x$:**
$$x = \frac{86}{-43} = -2$$
6. **Substitute $x = -2$ into one original equation to find $y$:** Using the second equation:
$$4(-2) + 3y = -23$$
$$-8 + 3y = -23$$
$$3y = -23 + 8 = -15$$
$$y = \frac{-15}{3} = -5$$
**Final answer:**
$$x = -2, \quad y = -5$$
Solve System 96A5Ea
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.