1045(1)
7≤ 2х +3 ≤11
7-3 ≤ 2х ≤11-3
4≤2х≤8
4÷2≤х≤8:2
2≤х≤4
х∈ [2;4]
1046 (2)
1,75 + (2х/3) < x + 1 2/3 |*3
3*1.75 + 2x < 3x + 3* (5/3)
5.25 + 2x < 3x + 5
5.25 - 5 < 3x -2x
0.25x> 0.25
x∈ (0.25;∞)
1047(1)
(7х+2)/6 - х < (5x+4)/3 - 4x
(7x + 2 - 6x) / 6 < (5x +4 -12x)/ 3
(x+2)/6 < (4-7x)/3 |*6
x+2 < 2 *( 4-7x)
x+ 2 < 8 - 14x
x+14x<8+2<br>15x<10 <br>x<10/15<br>x< 2/3
x∈(-∞; 2/3)