Question

Розв'яжіть 2 та 3, даю 50 балів
​

Answer 1

Ответ:

$2. \ [-4;3]\\\\3.\ (-\frac{1}{3};1)$

Объяснение:

$\displaystle 2.\\\begin{cases}5x+3\le 6x+7\\x-1\le 5-x\end{cases}\\\\\\\begin{cases}5x-6x\le 7-3\\x+x\le 5+1\end{cases}\\\\\\\begin{cases}-x\le 4\ \ \ |:(-1)\\ 2x\le 6\ \ \ |:2\end{cases}\\\\\\\begin{cases}x\ge -4\\ x\le 3\end{cases}\\\\\\x\in[-4;3]$

$\displaystle 3.\\-2 < 1-3x < 2\ \ \ |-1\\\\-3 < -3x < 1\ \ \ |:(-3)\\\\\\1 > x > -\frac{1}{3}\\\\-\frac{1}{3} < x < 1\\\\x\in (-\frac{1}{3};1)$