Bright Barber
12/22/2023 · Middle School

(c) \( \binom{7 x+3 y=-26}{4 x+y=-4} \)

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Para resolver el sistema de ecuaciones: 1. \( 7x + 3y = -26 \) 2. \( 4x + y = -4 \) Podemos usar el método de sustitución o el método de eliminación. Aquí utilizaremos el método de eliminación. Primero, despejamos \( y \) de la segunda ecuación: \[ y = -4 - 4x \] Ahora sustituimos esta expresión de \( y \) en la primera ecuación: \[ 7x + 3(-4 - 4x) = -26 \] Simplificamos: \[ 7x - 12 - 12x = -26 \] Combinamos términos semejantes: \[ -5x - 12 = -26 \] Sumamos 12 a ambos lados: \[ -5x = -14 \] Dividimos entre -5: \[ x = \frac{14}{5} \] Ahora sustituimos el valor de \( x \) en la ecuación que despejamos para \( y \): \[ y = -4 - 4\left(\frac{14}{5}\right) \] Calculamos: \[ y = -4 - \frac{56}{5} = -\frac{20}{5} - \frac{56}{5} = -\frac{76}{5} \] Por lo tanto, la solución del sistema de ecuaciones es: \[ \left( x, y \right) = \left( \frac{14}{5}, -\frac{76}{5} \right) \]

Quick Answer

La solución del sistema de ecuaciones es \( \left( x, y \right) = \left( \frac{14}{5}, -\frac{76}{5} \right) \).
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