1. **Stating the problem:** Solve the system of equations using the mixed method (Elimination-Substitution):
$$\begin{cases} 3x - 5y = 5 \\ 4x - 3y = 14 \end{cases}$$
2. **Formula and rules:**
- Elimination method involves adding or subtracting equations to eliminate one variable.
- Substitution method involves solving one equation for one variable and substituting into the other.
3. **Step 1: Eliminate one variable.**
Multiply the first equation by 3 and the second by 5 to align coefficients of $y$:
$$\begin{cases} 3(3x - 5y) = 3(5) \\ 5(4x - 3y) = 5(14) \end{cases}$$
which gives
$$\begin{cases} 9x - 15y = 15 \\ 20x - 15y = 70 \end{cases}$$
4. **Step 2: Subtract the first from the second to eliminate $y$:**
$$ (20x - 15y) - (9x - 15y) = 70 - 15 $$
$$ 20x - 15y - 9x + 15y = 55 $$
$$ (20x - 9x) + (-15y + 15y) = 55 $$
$$ 11x + 0 = 55 $$
$$ 11x = 55 $$
5. **Step 3: Solve for $x$:**
$$ x = \frac{55}{11} $$
Intermediate step showing cancellation:
$$ x = \frac{\cancel{55}}{\cancel{11}} = 5 $$
6. **Step 4: Substitute $x=5$ into the first original equation to find $y$:**
$$ 3(5) - 5y = 5 $$
$$ 15 - 5y = 5 $$
7. **Step 5: Solve for $y$:**
$$ -5y = 5 - 15 $$
$$ -5y = -10 $$
$$ y = \frac{-10}{-5} $$
Intermediate step showing cancellation:
$$ y = \frac{\cancel{-10}}{\cancel{-5}} = 2 $$
8. **Final answer:**
$$ \boxed{x=5, y=2} $$
Sistem Persistem D2A08A
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.