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\( \left. \begin{array} { l l } { x = 5 } & { 4 x - 4 y = 12 } \\ { x = 7 } & { 3 x + 5 y = 25 } \end{array} \right. \)

Ask by Barrett Mccarthy. in Mexico
Mar 20,2025

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Tutor-Verified Answer

Answer

Las soluciones son \( (5, 2) \) y \( (7, \frac{4}{5}) \).

Solution

Para resolver el sistema de ecuaciones dado, primero identificamos las ecuaciones: 1. \( x = 5 \) 2. \( 4x - 4y = 12 \) 3. \( x = 7 \) 4. \( 3x + 5y = 25 \) Observamos que hay dos valores diferentes para \( x \) (5 y 7). Esto significa que no podemos tener una solución única para \( y \) en ambos casos, ya que \( x \) no puede ser simultáneamente 5 y 7. Sin embargo, podemos resolver cada ecuación para \( y \) por separado. ### Paso 1: Resolver para \( y \) cuando \( x = 5 \) Sustituyendo \( x = 5 \) en la segunda ecuación: \[ 4(5) - 4y = 12 \] Calculamos: \[ 20 - 4y = 12 \] Restamos 20 de ambos lados: \[ -4y = 12 - 20 \] \[ -4y = -8 \] Dividimos entre -4: \[ y = 2 \] Por lo tanto, una solución es \( (5, 2) \). ### Paso 2: Resolver para \( y \) cuando \( x = 7 \) Sustituyendo \( x = 7 \) en la cuarta ecuación: \[ 3(7) + 5y = 25 \] Calculamos: \[ 21 + 5y = 25 \] Restamos 21 de ambos lados: \[ 5y = 25 - 21 \] \[ 5y = 4 \] Dividimos entre 5: \[ y = \frac{4}{5} \] Por lo tanto, otra solución es \( (7, \frac{4}{5}) \). ### Resumen de soluciones Las soluciones del sistema de ecuaciones son: 1. \( (5, 2) \) 2. \( (7, \frac{4}{5}) \)

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Bonus Knowledge

Let's dive into this system of equations! To begin solving, we notice that \(x\) has two values: 5 and 7. That means we can plug each \(x\) value into the corresponding equation to find \(y\). For \(x = 5\): 1. Substitute \(5\) into the second equation: \(4(5) - 4y = 12\) \(20 - 4y = 12\) \(20 - 12 = 4y\) \(8 = 4y\) \(y = 2\). For \(x = 7\): 2. Substitute \(7\) into the second equation: \(3(7) + 5y = 25\) \(21 + 5y = 25\) \(5y = 25 - 21\) \(5y = 4\) \(y = \frac{4}{5}\). So the solutions are: 1. For \(x = 5\), \(y = 2\) (so the point is (5, 2)). 2. For \(x = 7\), \(y = \frac{4}{5}\) (so the point is (7, 0.8)). Now you have two distinct points!

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