\[ 2y = 5x - 14 \]
\[ y = \frac{5x - 14}{2} \]
\[ y \]
в первое уравнение:\[ 3x + 4 \left( \frac{5x - 14}{2} \right) - 11 = 0 \]
\[ x \]
\[ 3x + 2(5x - 14) - 11 = 0 \]
\[ 3x + 10x - 28 - 11 = 0 \]
\[ 13x - 39 = 0 \]
\[ 13x = 39 \]
\[ x = 3 \]
\[ y \]
, подставив\[ x = 3 \]
во второе уравнение:\[ 5(3) - 2y - 14 = 0 \]
\[ 15 - 2y - 14 = 0 \]
\[ 1 - 2y = 0 \]
\[ 2y = 1 \]
\[ y = \frac{1}{2} \]
Проверка:
\[ 3(3) + 4(\frac{1}{2}) - 11 = 9 + 2 - 11 = 0 \]
\[ 5(3) - 2(\frac{1}{2}) - 14 = 15 - 1 - 14 = 0 \]
Ответ: (3; 1/2)