1. **Solve the equation** $\frac{x - 6}{4x} = \frac{1}{2}$.
2. Multiply both sides by $4x$ to eliminate the denominator:
$$x - 6 = \frac{1}{2} \times 4x = 2x$$
3. Rearrange to isolate $x$:
$$x - 6 = 2x \implies x - 2x = 6 \implies -x = 6 \implies x = -6$$
4. **Check for restrictions:** The denominator $4x \neq 0 \Rightarrow x \neq 0$. Since $x = -6$ is allowed, this is the solution.
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**Problem:** Solve $\frac{2x}{3} = \frac{8}{3}$.
1. Multiply both sides by 3 to clear denominators:
$$2x = 8$$
2. Divide both sides by 2:
$$x = 4$$
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**Problem:** Solve $\frac{x + 5}{2x} = \frac{3}{4}$.
1. Cross multiply:
$$(x + 5) \times 4 = 3 \times 2x$$
2. Simplify:
$$4x + 20 = 6x$$
3. Rearrange:
$$4x - 6x = -20 \implies -2x = -20 \implies x = 10$$
4. Check denominator $2x \neq 0 \Rightarrow x \neq 0$, so $x=10$ is valid.
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**Problem:** Solve $\frac{x + 2}{x + 4} = \frac{x - 2}{x + 2}$.
1. Cross multiply:
$$(x + 2)(x + 2) = (x - 2)(x + 4)$$
2. Expand both sides:
$$x^2 + 4x + 4 = x^2 + 4x - 8$$
3. Subtract $x^2 + 4x$ from both sides:
$$4 = -8$$
4. This is a contradiction, so no solution exists.
5. Check restrictions: denominators $x+4 \neq 0 \Rightarrow x \neq -4$, and $x+2 \neq 0 \Rightarrow x \neq -2$.
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**Problem:** Find vertical and horizontal asymptotes of $f(x) = \frac{4}{x - 1}$.
1. Vertical asymptote occurs where denominator is zero:
$$x - 1 = 0 \implies x = 1$$
2. Horizontal asymptote is $y = 0$ because degree numerator (0) < degree denominator (1).
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**Problem:** Find vertical and horizontal asymptotes of $f(x) = \frac{5x + 2}{2x + 1}$.
1. Vertical asymptote where denominator zero:
$$2x + 1 = 0 \implies x = -\frac{1}{2}$$
2. Horizontal asymptote: degrees numerator and denominator both 1, so ratio of leading coefficients:
$$y = \frac{5}{2}$$
Rational Equations 56A8Bd
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