Linear System C14672
1. **State the problem:** Solve the system of linear equations:
$$-\frac{1}{3}x + \frac{1}{2}y = 14$$
$$2x + \frac{1}{5}y = -\frac{4}{5}$$
2. **Rewrite the equations for clarity:**
Equation 1: $$-\frac{1}{3}x + \frac{1}{2}y = 14$$
Equation 2: $$2x + \frac{1}{5}y = -\frac{4}{5}$$
3. **Goal:** Find values of $x$ and $y$ that satisfy both equations simultaneously.
4. **Eliminate fractions by multiplying each equation by the least common denominator (LCD):**
- For Equation 1, LCD is 6:
$$6 \times \left(-\frac{1}{3}x + \frac{1}{2}y\right) = 6 \times 14$$
$$-2x + 3y = 84$$
- For Equation 2, LCD is 5:
$$5 \times \left(2x + \frac{1}{5}y\right) = 5 \times -\frac{4}{5}$$
$$10x + y = -4$$
5. **Rewrite the system without fractions:**
$$-2x + 3y = 84$$
$$10x + y = -4$$
6. **Use substitution or elimination. Here, use substitution:**
From second equation:
$$y = -4 - 10x$$
7. **Substitute $y$ into the first equation:**
$$-2x + 3(-4 - 10x) = 84$$
Simplify:
$$-2x - 12 - 30x = 84$$
$$-32x - 12 = 84$$
8. **Solve for $x$:**
$$-32x = 84 + 12$$
$$-32x = 96$$
$$x = \frac{96}{-32} = -3$$
9. **Find $y$ using $x = -3$:**
$$y = -4 - 10(-3) = -4 + 30 = 26$$
10. **Final solution:**
$$x = -3, \quad y = 26$$
This means the point $(-3, 26)$ satisfies both equations.