Solve System Adf0Ad
1. **State the problem:** Solve the system of equations:
$$\frac{x+1}{3} - \frac{y-1}{2} = 1$$
$$7x - 4(x + y) = 4$$
2. **Rewrite the first equation to clear denominators:** Multiply both sides by 6 (the least common multiple of 3 and 2):
$$6 \times \left(\frac{x+1}{3} - \frac{y-1}{2}\right) = 6 \times 1$$
This gives:
$$2(x+1) - 3(y-1) = 6$$
3. **Expand and simplify:**
$$2x + 2 - 3y + 3 = 6$$
$$2x - 3y + 5 = 6$$
$$2x - 3y = 1$$
4. **Simplify the second equation:**
$$7x - 4(x + y) = 4$$
Distribute:
$$7x - 4x - 4y = 4$$
$$3x - 4y = 4$$
5. **Now solve the system:**
$$\begin{cases} 2x - 3y = 1 \\ 3x - 4y = 4 \end{cases}$$
6. **Use elimination:** Multiply the first equation by 3 and the second by 2:
$$6x - 9y = 3$$
$$6x - 8y = 8$$
7. **Subtract the second from the first:**
$$(6x - 9y) - (6x - 8y) = 3 - 8$$
$$-9y + 8y = -5$$
$$-y = -5$$
$$y = 5$$
8. **Substitute $y=5$ into $2x - 3y = 1$:**
$$2x - 3(5) = 1$$
$$2x - 15 = 1$$
$$2x = 16$$
$$x = 8$$
**Final answer:**
$$\boxed{(x, y) = (8, 5)}$$