Question

|3х – бу = 8,
| 6х +
+3y = 3
способом сложения
5. Решите систему уравнений

Answer 1

Ответ:

$\left\{\begin{array}{l}3x-6y=8\\6x+3y=3\ |:3\end{array}\right\ \ \left\{\begin{array}{l}3x-6y=8\\2x+y=1\ |\cdot 6\end{array}\right\ \oplus \ \left\{\begin{array}{l}15x=14\\y=1-2x\end{array}\right$

$\left\{\begin{array}{l}x=\dfrac{14}{15}\\y=1-2\cdot \dfrac{14}{15}\end{array}\right\ \ \left\{\begin{array}{l}x=\dfrac{14}{15}\\\ y=-\dfrac{13}{15}\end{array}\right\ \ \ \ Otvet:\ \Big(\ \dfrac{14}{15}\ ;-\dfrac{13}{15}\ \Big)\ .$