1. **Problem statement:** Solve the system of equations:
$$3x - 2y = 11$$
$$4x + 5y = 7$$
2. **Method:** Use the elimination method by multiplying each equation to align coefficients for elimination.
3. Multiply the first equation by 5:
$$5(3x - 2y) = 5(11) \Rightarrow 15x - 10y = 55$$
4. Multiply the second equation by 2:
$$2(4x + 5y) = 2(7) \Rightarrow 8x + 10y = 14$$
5. Add the two new equations to eliminate $y$:
$$ (15x - 10y) + (8x + 10y) = 55 + 14 $$
$$ 15x + 8x = 69 $$
$$ 23x = 69 $$
6. Solve for $x$:
$$ x = \frac{69}{23} = 3 $$
7. Substitute $x=3$ into the first original equation to find $y$:
$$ 3(3) - 2y = 11 $$
$$ 9 - 2y = 11 $$
$$ -2y = 11 - 9 = 2 $$
$$ y = \frac{-2}{2} = -1 $$
**Final answer:**
$$ x = 3, \quad y = -1 $$
This matches your method and result, so your understanding is correct!
Linear System 11C6C7
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