1. **State the problem:** Solve the simultaneous equations:
$$\frac{4}{7x - 4} = \frac{1}{6y}$$
and
$$\frac{5x}{3y + 2} = 4$$
2. **Rewrite the equations:**
From the first equation:
$$\frac{4}{7x - 4} = \frac{1}{6y}$$
Cross-multiply to get:
$$4 \cdot 6y = 1 \cdot (7x - 4)$$
which simplifies to:
$$24y = 7x - 4$$
From the second equation:
$$\frac{5x}{3y + 2} = 4$$
Multiply both sides by $(3y + 2)$:
$$5x = 4(3y + 2)$$
which expands to:
$$5x = 12y + 8$$
3. **Express $x$ from the second equation:**
$$x = \frac{12y + 8}{5}$$
4. **Substitute $x$ into the first equation:**
$$24y = 7\left(\frac{12y + 8}{5}\right) - 4$$
Multiply both sides by 5 to clear the denominator:
$$5 \cdot 24y = 7(12y + 8) - 20$$
which is:
$$120y = 84y + 56 - 20$$
Simplify the right side:
$$120y = 84y + 36$$
5. **Solve for $y$:**
Subtract $84y$ from both sides:
$$120y - 84y = 36$$
$$36y = 36$$
Divide both sides by 36:
$$y = 1$$
6. **Find $x$ using $y=1$:**
$$x = \frac{12(1) + 8}{5} = \frac{12 + 8}{5} = \frac{20}{5} = 4$$
**Final answer:**
$$x = 4, \quad y = 1$$
Simultaneous Equations A4B857
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