1. **State the problem:** Solve the system of linear equations:
$$-5x - 8y = 17$$
$$2x - 7y = -17$$
2. **Choose a method:** We will use the elimination method to solve for $x$ and $y$.
3. **Eliminate one variable:** Multiply the second equation by 5 to align coefficients of $x$:
$$5 \times (2x - 7y) = 5 \times (-17)$$
$$10x - 35y = -85$$
4. Multiply the first equation by 2:
$$2 \times (-5x - 8y) = 2 \times 17$$
$$-10x - 16y = 34$$
5. **Add the two new equations to eliminate $x$:**
$$(-10x - 16y) + (10x - 35y) = 34 + (-85)$$
$$\cancel{-10x} - 16y + \cancel{10x} - 35y = -51$$
$$-51y = -51$$
6. **Solve for $y$:**
$$y = \frac{-51}{-51} = 1$$
7. **Substitute $y=1$ into one original equation to find $x$:** Using the second equation:
$$2x - 7(1) = -17$$
$$2x - 7 = -17$$
$$2x = -17 + 7$$
$$2x = -10$$
8. **Solve for $x$:**
$$x = \frac{\cancel{2}x}{\cancel{2}} = \frac{-10}{2} = -5$$
9. **Final solution:**
$$x = -5, \quad y = 1$$
This means the two lines intersect at the point $(-5, 1)$.
Linear System 825F77
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