Question

Пожалуйста помогите даю 70 баллов!Срочно!

Answer 1

$\displaystyle\bf\\1)\\\\\left \{ {{3x-9 < 0} \atop {x+2 > 3}} \right. \ \ \Rightarrow \ \ \left \{ {{3x < 9} \atop {x > 3-2}} \right. \ \ \Rightarrow \ \ \left \{ {{x < 3} \atop {x > 1}} \right. \\\\\\Otvet \ : \ x\in\Big(1 \ ; \ 3\Big)\\\\2)$

$\displaystyle\bf\\\left \{ {{5x-3\geq 7} \atop {2-x\leq 1}} \right. \ \ \Rightarrow \ \ \left \{ {{5x\geq 7+3} \atop {-x\leq 1-2}} \right. \ \ \Rightarrow \ \ \left \{ {{5x\geq 10} \atop {-x\leq -1}} \ \right. \ \ \Rightarrow \ \ \left \{ {{x\geq 2} \atop {x\geq 1}} \right. \\\\\\Otvet \ : \ x\in\Big[2 \ ; \ +\infty\Big)$