Question

решите прошу прошу прошу прошу отдаю все баллы

Answer 1

1) х>2.5
 Ответ  x ∈(2,5; +∞)
2)$\left \{ {{-2x \leq -3} \atop {x \leq 3}} \right. \left \{ {{x \leq -3:(-2)} \atop {x \leq 3}} \right. \left \{ {{x \leq 3/2} \atop {x \leq 3}} \right. \left \{ {{x \leq 1,5} \atop {x \leq 3}} \right.$
  х≤1,5
Ответ: х∈(-∞;1,5]
3) -2<x<-1.5
 Ответ x∈ (-2;-1,5)
4)$\left \{ {{4-5x\ \textgreater \ -1} \atop { \frac{1}{6}x\ \textless \ 2 }} \right. \left \{ {{-5x\ \textgreater \ -5} \atop {x\ \textless \ 2*6}} \right. \left \{ {x\ \textgreater \ 1} \atop {x\ \textless \ 12}} \right.$
   1<x<12
Ответ x∈(1;12)
5)$\left \{ {{0,6x \leq 9} \atop { \frac{1}{3}x \geq 2 }} \right. \left \{ {{x \leq (9*10)/6} \atop {x \geq 2*3}} \right. \left \{ {{x \leq 15} \atop {x \geq 6}} \right.$
   6≤x≤15
Ответ: х∈[6;15]
6)$\left \{ {{9x\ \textgreater \ 0} \atop {x \geq -1*7}} \right. \left \{ {{x\ \textgreater \ 0} \atop { \geq -7}} \right.$
  x>0
Ответ x∈(0;+∞)