System Elimination 0Ba245
1. **State the problem:** Solve the system of equations using elimination:
$$\begin{cases} 2x + y = 9 \\ 3x - y = 16 \end{cases}$$
2. **Explain the elimination method:** The goal is to eliminate one variable by adding or subtracting the equations.
3. **Add the two equations:**
$$ (2x + y) + (3x - y) = 9 + 16 $$
Simplify:
$$ 2x + 3x + y - y = 25 $$
$$ 5x = 25 $$
4. **Solve for $x$:**
$$ x = \frac{25}{5} = 5 $$
5. **Substitute $x=5$ into one of the original equations, for example $2x + y = 9$:**
$$ 2(5) + y = 9 $$
$$ 10 + y = 9 $$
6. **Solve for $y$:**
$$ y = 9 - 10 = -1 $$
7. **Final solution:**
$$ (x, y) = (5, -1) $$
This means the two lines intersect at the point $(5, -1)$.