Tham khảo câu trả lời từ Trợ lý ảo Lazi To solve the given equation \( | \frac{7}{5}X + \frac{3}{2} | = | \frac{4}{3}X - \frac{1}{4} | \), we need to consider two cases based on the properties of absolute values. ### Case 1: Both sides are positive or both are negative. \[ \frac{7}{5}X + \frac{3}{2} = \frac{4}{3}X - \frac{1}{4} \] ### Case 2: One side is positive and the other one is negative. \[ \frac{7}{5}X + \frac{3}{2} = -\left(\frac{4}{3}X - \frac{1}{4}\right) \] ### Solving Case 1: 1. Start with: \[ \frac{7}{5}X + \frac{3}{2} = \frac{4}{3}X - \frac{1}{4} \] 2. Get all terms involving \(X\) on one side and constant terms on the other side: \[ \frac{7}{5}X - \frac{4}{3}X = -\frac{1}{4} - \frac{3}{2} \] 3. Find a common denominator for the \(X\) coefficients. The LCM of 5 and 3 is 15. Thus, \[ \frac{7}{5}X = \frac{21}{15}X \quad \text{and} \quad \frac{4}{3}X = \frac{20}{15}X \] Hence, \[ \frac{21}{15}X - \frac{20}{15}X = \frac{1}{15}X \] 4. Calculate the right side: \[ -\frac{1}{4} - \frac{3}{2} = -\frac{1}{4} - \frac{6}{4} = -\frac{7}{4} \] Therefore, \[ \frac{1}{15}X = -\frac{7}{4} \] 5. Multiplying both sides by 15 gives: \[ X = -\frac{7}{4} \times 15 = -\frac{105}{4} \] ### Solving Case 2: 1. Start with: \[ \frac{7}{5}X + \frac{3}{2} = -\left(\frac{4}{3}X - \frac{1}{4}\right) \] 2. Expanding the right side: \[ \frac{7}{5}X + \frac{3}{2} = -\frac{4}{3}X + \frac{1}{4} \] 3. Get all \(X\) terms on one side and constant terms on the other side: \[ \frac{7}{5}X + \frac{4}{3}X = \frac{1}{4} - \frac{3}{2} \] 4. Again, using a common denominator for the \(X\) coefficients: \[ \frac{7}{5}X = \frac{21}{15}X \quad \text{and} \quad \frac{4}{3}X = \frac{20}{15}X \] Therefore, \[ \frac{21}{15}X + \frac{20}{15}X = \frac{41}{15}X \] 5. Calculate the right side: \[ \frac{1}{4} - \frac{3}{2} = \frac{1}{4} - \frac{6}{4} = -\frac{5}{4} \] Thus, \[ \frac{41}{15}X = -\frac{5}{4} \] 6. Multiplying both sides by \(\frac{15}{41}\) gives: \[ X = -\frac{5}{4} \cdot \frac{15}{41} = -\frac{75}{164} \] ### Final Solutions: The solutions to the equation \( | \frac{7}{5}X + \frac{3}{2} | = | \frac{4}{3}X - \frac{1}{4} | \) are: \[ X = -\frac{105}{4} \quad \text{and} \quad X = -\frac{75}{164} \]