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Solve the system by substitution.y, equals, 6, xy=6xy, equals, 3, x, plus, 21y=3x+21

Question

Solve the system by substitution.y, equals, 6, xy=6xy, equals, 3, x, plus, 21y=3x+21

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Solution

Claro, vamos a resolver el sistema de ecuaciones por sustitución paso a paso.

Dado el sistema de ecuaciones:

  1. y=6x y = 6x
  2. y=3x+21 y = 3x + 21

Paso 1: Sustituir la ecuación (1) en la ecuación (2).

Dado que y=6x y = 6x , sustituimos y y en la ecuación (2): 6x=3x+21 6x = 3x + 21

Paso 2: Resolver para x x .

Restamos 3x 3x de ambos lados de la ecuación: 6x3x=21 6x - 3x = 21 3x=21 3x = 21

Dividimos ambos lados de la ecuación por 3: x=213 x = \frac{21}{3} x=7 x = 7

Paso 3: Sustituir el valor de x x en la ecuación (1) para encontrar y y .

Usamos la ecuación y=6x y = 6x : y=6(7) y = 6(7) y=42 y = 42

Por lo tanto, la solución del sistema de ecuaciones es: x=7 x = 7 y=42 y = 42

This problem has been solved

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