Question

допоможіть будь-ласка даю 20б​

Answer 1

$\displaystyle\bf\\7) \ \left\{\begin{array}{ccc}x-6 > 1\\-x > -9\\2x-15 > 0\end{array}\right\\\\\\\left\{\begin{array}{ccc}x > 7\\x < 9\\2x > 15\end{array}\right\\\\\\\left\{\begin{array}{ccc}x > 7\\x < 9\\x > 7,5\end{array}\right\\\\\\Otvet \ : \ \Big(7,5 \ ; \ 9\Big)\\\\\\8) \ \left \{ {{\dfrac{2x-1}{2} < 5} \atop {x-7\leq 1}} \right. \\\\\\ \left \{ {{\dfrac{2x-1}{2} \cdot 2 < 5\cdot 2} \atop {x\leq 8}} \right. \\\\\\\left \{ {{2x-1 < 10} \atop {x\leq 8}} \right.$

$\displaystyle\bf\\\left \{ {{2x < 11} \atop {x\leq 8}} \right. \\\\\\\left \{ {{x < 5,5} \atop {x\leq 8}} \right. \\\\\\Otvet \ : \ \Big(-\infty \ ; \ 5,5\Big)$