{9x + 5 ≤ 7x - 4
{15 - 2x > 3x + 1
{2x ≤ -9
{5x < 14
{x ≤ -4,5
{x < 2,8
x ∈ (-∞; -4,5]
2)
{0,6x - 1,2 < 1,1x + 2,1
{2,3 + 1,7x ≤ 1,5x + 3
{0,5x > -3,3
{0,2x ≤ 0,7
{x > -6,6
{x ≤ 3,5
x ∈ (-6,6; 3,5]
8.
|x-2| < 8
-8 < x-2 < 8
-6 < x < 10
x ∈ (-6; 10)
2)
|4x+1| ≥ 5
[4x + 1 ≤ -5
[4x + 1 ≥ 5
[4x ≤ -6
[4x ≥ 4
[x ≤ -1,5
[x ≥ 1
x ∈ (-∞; -1,5] U [1; +∞)