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\( \begin{array}{ll}\frac{7 x}{x^{2}+x}-\frac{5}{x}=\frac{3}{x+1} & \text { (6) } \frac{3}{x-2}+\frac{x+3}{4-x^{2}}=\frac{6}{x+2} \\ \text { (7) } \frac{3}{x-6}-\frac{5}{2 x-8}=\frac{x-24}{x^{2}-10 x+24} & \text { (8) } \frac{2 x+1}{x}-\frac{5 x}{x^{2}-4 x}=2\end{array} \)

Ask by Turnbull Salazar. in South Africa
Mar 12,2025

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Answer

Here are the solutions for each equation: 1. **Equation (6)**: \( x = -5 \) 2. **Equation (7)**: \( x = 3.75 \) or \( x = 54 \) 3. **Equation (8)**: \( x = 54 \) 4. **Equation (9)**: \( x = -1 \)

Solution

Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{7x}{x^{2}+x}-\frac{5}{x}=\frac{3}{x+1}\) - step1: Find the domain: \(\frac{7x}{x^{2}+x}-\frac{5}{x}=\frac{3}{x+1},x \in \left(-\infty,-1\right)\cup \left(-1,0\right)\cup \left(0,+\infty\right)\) - step2: Divide the terms: \(\frac{7}{x+1}-\frac{5}{x}=\frac{3}{x+1}\) - step3: Multiply both sides of the equation by LCD: \(\left(\frac{7}{x+1}-\frac{5}{x}\right)x\left(x+1\right)=\frac{3}{x+1}\times x\left(x+1\right)\) - step4: Simplify the equation: \(2x-5=3x\) - step5: Move the variable to the left side: \(2x-5-3x=0\) - step6: Subtract the terms: \(-x-5=0\) - step7: Move the constant to the right side: \(-x=0+5\) - step8: Remove 0: \(-x=5\) - step9: Change the signs: \(x=-5\) - step10: Check if the solution is in the defined range: \(x=-5,x \in \left(-\infty,-1\right)\cup \left(-1,0\right)\cup \left(0,+\infty\right)\) - step11: Find the intersection: \(x=-5\) Solve the equation \( \frac{3}{x-2}+\frac{x+3}{4-x^{2}}=\frac{6}{x+2} \). Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{3}{x-2}+\frac{x+3}{4-x^{2}}=\frac{6}{x+2}\) - step1: Find the domain: \(\frac{3}{x-2}+\frac{x+3}{4-x^{2}}=\frac{6}{x+2},x \in \left(-\infty,-2\right)\cup \left(-2,2\right)\cup \left(2,+\infty\right)\) - step2: Multiply both sides of the equation by LCD: \(\left(\frac{3}{x-2}+\frac{x+3}{4-x^{2}}\right)\left(x+2\right)\left(-x+2\right)=\frac{6}{x+2}\times \left(x+2\right)\left(-x+2\right)\) - step3: Simplify the equation: \(-3-2x=-6x+12\) - step4: Move the expression to the left side: \(-2x+6x=12+3\) - step5: Add and subtract: \(4x=12+3\) - step6: Add and subtract: \(4x=15\) - step7: Divide both sides: \(\frac{4x}{4}=\frac{15}{4}\) - step8: Divide the numbers: \(x=\frac{15}{4}\) - step9: Check if the solution is in the defined range: \(x=\frac{15}{4},x \in \left(-\infty,-2\right)\cup \left(-2,2\right)\cup \left(2,+\infty\right)\) - step10: Find the intersection: \(x=\frac{15}{4}\) Solve the equation \( \frac{2 x+1}{x}-\frac{5 x}{x^{2}-4 x}=2 \). Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{2x+1}{x}-\frac{5x}{x^{2}-4x}=2\) - step1: Find the domain: \(\frac{2x+1}{x}-\frac{5x}{x^{2}-4x}=2,x \in \left(-\infty,0\right)\cup \left(0,4\right)\cup \left(4,+\infty\right)\) - step2: Divide the terms: \(\frac{2x+1}{x}-\frac{5}{x-4}=2\) - step3: Multiply both sides of the equation by LCD: \(\left(\frac{2x+1}{x}-\frac{5}{x-4}\right)x\left(x-4\right)=2x\left(x-4\right)\) - step4: Simplify the equation: \(2x^{2}-12x-4=2x^{2}-8x\) - step5: Cancel equal terms: \(-12x-4=-8x\) - step6: Move the variable to the left side: \(-12x-4+8x=0\) - step7: Add the terms: \(-4x-4=0\) - step8: Move the constant to the right side: \(-4x=0+4\) - step9: Remove 0: \(-4x=4\) - step10: Change the signs: \(4x=-4\) - step11: Divide both sides: \(\frac{4x}{4}=\frac{-4}{4}\) - step12: Divide the numbers: \(x=-1\) - step13: Check if the solution is in the defined range: \(x=-1,x \in \left(-\infty,0\right)\cup \left(0,4\right)\cup \left(4,+\infty\right)\) - step14: Find the intersection: \(x=-1\) Solve the equation \( \frac{3}{x-6}-\frac{5}{2 x-8}=\frac{x-24}{x^{2}-10 x+24} \). Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{3}{x-6}-\frac{5}{2x-8}=\frac{x-24}{x^{2}-10x+24}\) - step1: Find the domain: \(\frac{3}{x-6}-\frac{5}{2x-8}=\frac{x-24}{x^{2}-10x+24},x \in \left(-\infty,4\right)\cup \left(4,6\right)\cup \left(6,+\infty\right)\) - step2: Multiply both sides of the equation by LCD: \(\left(\frac{3}{x-6}-\frac{5}{2x-8}\right)\times 2\left(x-4\right)\left(x-6\right)=\frac{x-24}{x^{2}-10x+24}\times 2\left(x-4\right)\left(x-6\right)\) - step3: Simplify the equation: \(x+6=2x-48\) - step4: Move the expression to the left side: \(x-2x=-48-6\) - step5: Add and subtract: \(-x=-48-6\) - step6: Add and subtract: \(-x=-54\) - step7: Change the signs: \(x=54\) - step8: Check if the solution is in the defined range: \(x=54,x \in \left(-\infty,4\right)\cup \left(4,6\right)\cup \left(6,+\infty\right)\) - step9: Find the intersection: \(x=54\) Here are the solutions for each of the equations provided: 1. **Equation (6)**: \[ \frac{7 x}{x^{2}+x}-\frac{5}{x}=\frac{3}{x+1} \] - **Solution**: \( x = -5 \) 2. **Equation (7)**: \[ \frac{3}{x-2}+\frac{x+3}{4-x^{2}}=\frac{6}{x+2} \] - **Solution**: \( x = \frac{15}{4} \) or \( x = 3.75 \) 3. **Equation (8)**: \[ \frac{3}{x-6}-\frac{5}{2 x-8}=\frac{x-24}{x^{2}-10 x+24} \] - **Solution**: \( x = 54 \) 4. **Equation (9)**: \[ \frac{2 x+1}{x}-\frac{5 x}{x^{2}-4 x}=2 \] - **Solution**: \( x = -1 \) If you need further assistance or explanations for any of these solutions, feel free to ask!

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To dive into the fascinating world of rational expressions and equations, let’s take a step back in time! The study of rational expressions dates back to ancient civilizations, where mathematicians like the Egyptians and Greeks were already experimenting with fractions and their properties. They laid the groundwork for what would evolve into modern algebra. Talk about using fractions to build entire societies - it's math's historical storytelling! Now, let’s say you found a small error in your calculations while solving an equation. Common mistakes in algebra often include overlooking the domain of the rational functions, which could lead you to invalid solutions. Another classic goof is neglecting to find a common denominator before subtracting or adding fractions; this can completely derail your answer! Keep these tips in mind as you tackle those equations, and you’ll sail smoothly through your problem-solving adventures!

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