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7. \begin{tabular}{l}\( 2 x+3 y-1=0 \) \\ \( 4 x+6 y+7=0 \) \\ \hline\end{tabular}

Ask by Lee Martinez. in Chile
Mar 22,2025

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Answer

El sistema de ecuaciones no tiene solución.

Solution

1. Escribimos el sistema de ecuaciones: \[ \begin{cases} 2x + 3y - 1 = 0 \quad \Rightarrow \quad 2x + 3y = 1 \\ 4x + 6y + 7 = 0 \quad \Rightarrow \quad 4x + 6y = -7 \end{cases} \] 2. Observamos que la segunda ecuación es el doble de los coeficientes de la primera. Multiplicamos la primera ecuación por 2: \[ 2(2x + 3y) = 2 \cdot 1 \quad \Rightarrow \quad 4x + 6y = 2 \] 3. Comparamos la ecuación obtenida \(4x + 6y = 2\) con la segunda ecuación \(4x + 6y = -7\). Al tener el mismo lado izquierdo pero diferentes términos independientes, se tiene una contradicción: \[ 2 \neq -7 \] 4. Debido a dicha contradicción, concluimos que el sistema es inconsistente y, por tanto, no tiene solución. La respuesta final es: el sistema no tiene solución.

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Mind Expander

The two equations you've provided are linear equations in two variables. Let’s rewrite them for clarity: the first equation is \( 2x + 3y - 1 = 0 \) and the second is \( 4x + 6y + 7 = 0 \). Now, if we look closely, the second equation can be simplified. Notice that if you multiply the first equation by 2, you get \( 4x + 6y - 2 = 0 \). The second equation, however, becomes \( 4x + 6y + 7 = 0 \), which implies that they are parallel lines that will never intersect since their slopes are identical but their y-intercepts differ. This means that the system of equations has no solution! Isn’t it fascinating how parallel lines tell us so much about their relationship simply through their equations?

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