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Resolver para \( y \). \( \quad \frac{4}{7}=\frac{y+7}{21} \) Simplificar su respuesta tanto como sea posible. \( y=\square \)

Ask by Reese Flynn. in Ecuador
Feb 25,2025

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Answer

y = 5

Solution

Empezamos con la ecuación:   4/7 = (y + 7)/21 Multiplicamos ambos lados de la ecuación por 21 para eliminar el denominador:   21 × (4/7) = y + 7 Calculamos 21 × (4/7):   (21 ÷ 7) × 4 = 3 × 4 = 12 Así, tenemos:   12 = y + 7 Restamos 7 de ambos lados para aislar y:   12 – 7 = y Finalmente:   y = 5 Por lo tanto, la respuesta simplificada es: y = 5

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Para resolver la ecuación \(\frac{4}{7}=\frac{y+7}{21}\), comienza multiplicando en cruz. Esto significa multiplicar \(4\) por \(21\) y \(7\) por \(y + 7\): \[ 4 \cdot 21 = 7 \cdot (y + 7) \] \[ 84 = 7y + 49 \] Ahora, resta \(49\) de ambos lados: \[ 84 - 49 = 7y \] \[ 35 = 7y \] Luego, divide ambos lados por \(7\): \[ y = \frac{35}{7} = 5 \] Entonces, la solución es \(y = 5\).

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