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\( c \left\{ \begin{array} { l } { 4 y + x = 4 } \\ { \frac { y - 2 x } { 2 } = x - 1 } \end{array} \right. \)

Ask by Wright Robbins. in Argentina
Mar 19,2025

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Answer

La solución del sistema es \( x = \frac{12}{17} \) y \( y = \frac{14}{17} \).

Solution

1. Escribimos el sistema de ecuaciones: \[ \begin{cases} 4y + x = 4 \quad \text{(Ecuación 1)} \\ \frac{y - 2x}{2} = x - 1 \quad \text{(Ecuación 2)} \end{cases} \] 2. Multiplicamos la Ecuación 2 por 2 para eliminar el denominador: \[ y - 2x = 2(x - 1) \] 3. Simplificamos la Ecuación 2: \[ y - 2x = 2x - 2 \] Sumamos \(2x\) a ambos lados: \[ y = 4x - 2 \] 4. Sustituimos \(y = 4x - 2\) en la Ecuación 1: \[ 4(4x - 2) + x = 4 \] Desarrollamos el paréntesis: \[ 16x - 8 + x = 4 \] Sumamos \(16x\) y \(x\): \[ 17x - 8 = 4 \] Sumamos 8 a ambos lados: \[ 17x = 12 \] Dividimos ambos lados entre 17: \[ x = \frac{12}{17} \] 5. Sustituimos el valor de \(x\) en \(y = 4x - 2\) para hallar \(y\): \[ y = 4\left(\frac{12}{17}\right) - 2 = \frac{48}{17} - 2 \] Convertimos 2 en fracción con denominador 17: \[ y = \frac{48}{17} - \frac{34}{17} = \frac{14}{17} \] 6. La solución del sistema es: \[ x = \frac{12}{17}, \quad y = \frac{14}{17} \]

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To solve the system of equations, let's rewrite the second equation to eliminate the fraction: 1. The first equation is \( 4y + x = 4 \). 2. The second equation can be rewritten as \( y - 2x = 2(x - 1) \) which simplifies to \( y - 2x = 2x - 2 \), leading to \( y = 4x - 2 \). Now we can substitute \( y = 4x - 2 \) into the first equation: \( 4(4x - 2) + x = 4 \) Expanding this gives: \( 16x - 8 + x = 4 \) Combining like terms results in: \( 17x - 8 = 4 \) Adding 8 to both sides: \( 17x = 12 \) Dividing by 17: \( x = \frac{12}{17} \) Now substituting \( x \) back into \( y = 4x - 2 \): \( y = 4\left(\frac{12}{17}\right) - 2 = \frac{48}{17} - \frac{34}{17} = \frac{14}{17} \) The solution to the system is \( x = \frac{12}{17} \) and \( y = \frac{14}{17} \).

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