Question: Solve the system of equations.
-10y + 9x = -9
10y + 5x = -5
1. **State the problem:** Solve the system of linear equations:
$$-10y + 9x = -9$$
$$10y + 5x = -5$$
2. **Add the two equations to eliminate $y$: **
$$(-10y + 9x) + (10y + 5x) = -9 + (-5)$$
This simplifies to:
$$9x + 5x = -14$$
$$14x = -14$$
3. **Solve for $x$: **
$$x = \frac{-14}{14}$$
$$x = -1$$
4. **Substitute $x = -1$ into the second equation to find $y$: **
$$10y + 5(-1) = -5$$
$$10y - 5 = -5$$
$$10y = 0$$
$$y = 0$$
5. **Check the solution in the first equation: **
$$-10(0) + 9(-1) = -9$$
$$0 - 9 = -9$$
True.
6. **Final answer:**
$$x = -1, y = 0$$
Note: The user provided $x=0.2$ and $y=-0.4$ as the intersection point, but solving the system yields $x=-1$ and $y=0$.