Question

$\left \{ {{\frac{x}{2}-2y=3 } \atop {3y-x=1}} \right.$

Answer 1

Пошаговое объяснение:

$x - 4y = 6\\ 3y - x = 1$

$x = 6 + 4y \\ 3y - 6 - 4y = 1$

$- y = 7 \\ x = 6 + 4y$

$y = - 7 \\ x = 6 + 4 \times ( - 7) = - 22$

(-22; -7)

Answer 2

$\begin{cases} \frac{x}{2} - 2y = 3 \mid \times \: 2 \\ 3y - x = 1 \end{cases} \\ \begin{cases}x - 4 y = 6 \\ - x + 3y = 1 \end{cases} \\ \\ - y = 7 \\ y = - 7 \\ \\ 3 \times ( - 7) - x = 1 \\ - 21 - x = 1 \\ - x = 1 + 21 \\ - x = 22 \\ x = - 22 \\ \\ \boldsymbol{( - 22; \: - 7) }$