7.1-bo'lim: Ikki o'zgaruvchiga ega chiziqli tizimlar

1-3-masalalarda berilgan tizimning yechimini topish yoki tizimning nomuvofiq yoki bog'liqligini aniqlash uchun almashtirish usulidan foydalaning.

1. \(\begin{align*}x - 7y & = - 11\\ 5x + 2y & = - 18\end{align*}\) Yechim
2. \(\begin{align*}7x - 8y & = - 12\\ - 4x + 2y & = 3\end{align*}\) Yechim
3. \(\begin{align*}3x + 9y & = - 6\\ - 4x - 12y & = 8\end{align*}\) Yechim

4-6-muammolar uchun ushbu tizimning yechimini topish yoki tizimning nomuvofiq yoki bog'liqligini aniqlash uchun Yo'q qilish usulidan foydalaning.

1. \(\begin{align*}6x - 5y & = 8\\ - 12x + 2y & = 0\end{align*}\) Yechim
2. \(\begin{align*} - 2x + 10y & = 2\\ 5x - 25y & = 3\end{align*}\) Yechim
3. \(\begin{align*}2x + 3y & = 20\\ 7x + 2y & = 53\end{align*}\) Yechim