1. **State the problem:** Solve the system of linear equations using the elimination method:
$$3x + 2y = 8$$
$$4x - y = 2$$
2. **Goal:** Eliminate one variable by making the coefficients of either $x$ or $y$ the same (or opposites) in both equations.
3. **Eliminate $y$:** Multiply the second equation by 2 to match the coefficient of $y$ in the first equation:
$$2 \times (4x - y) = 2 \times 2$$
$$8x - 2y = 4$$
4. **Add the two equations:**
$$3x + 2y = 8$$
$$8x - 2y = 4$$
Adding gives:
$$3x + 2y + 8x - 2y = 8 + 4$$
$$ (3x + 8x) + (2y - 2y) = 12$$
$$11x + \cancel{2y - 2y} = 12$$
$$11x = 12$$
5. **Solve for $x$:**
$$x = \frac{12}{11}$$
6. **Substitute $x$ back into one original equation to find $y$:** Use the second equation:
$$4x - y = 2$$
$$4 \times \frac{12}{11} - y = 2$$
$$\frac{48}{11} - y = 2$$
7. **Isolate $y$:**
$$-y = 2 - \frac{48}{11}$$
$$-y = \frac{22}{11} - \frac{48}{11}$$
$$-y = -\frac{26}{11}$$
8. **Multiply both sides by $-1$ to solve for $y$:**
$$y = \cancel{-1} \times \cancel{-1} \frac{26}{11}$$
$$y = \frac{26}{11}$$
**Final answer:**
$$x = \frac{12}{11}, \quad y = \frac{26}{11}$$
Elimination Method 7Beb8C
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