Question

Задания на скрине (даю 35 баллов)

Answer 1

$\left\{\begin{array}{l}\frac{15x+7y}{16}-\frac{3x-y}{4}=-1\\3x-\frac{10-y}{6}=2-y\end{array}\right\; \; \left\{\begin{array}{l}15x+7y-4(3x-y)=-16\\18x-10+y=12-6y\end{array}\right\\\\\\\left\{\begin{array}{l}3x+11y=-16\, |\cdot (-6)\\18x+7y=22\end{array}\right\; \; \left\{\begin{array}{ccc}-18x-66y=96\\18x+7y=22\end{array}\right\; \oplus \; \left\{\begin{array}{l}-59y=118\\18x+7y=22\end{array}\right$

$\left\{\begin{array}{l}y=-2\\18x=22+14\end{array}\right\; \; \left\{\begin{array}{l}y=-2\\x=2\end{array}\right$