1)
2x — 4 > 6
(5;oo)
2x + 3 ≤ 1
(-oo;-1]
7x — 7 > — 7
(0;oo)
10x — 20 > 30
(5;oo)
25x — 50 ≤ 25
(-oo;3]
4(x — 2) > 2(x + 2)
(6;oo)
10(x — 4) ≥ 8(x + 2)
[28;oo)
2(x — 3) > 4(x + 3)
(-oo;-9)
5(x — 2) ≤ 7(x — 3)
[5,5;oo)
2)
x(x — 5) > 0
(-oo;0)U(5;oo)
x(2x — 6) > 0
(-oo;3)U(6;oo)
(2x — 4)(3x + 3) > 0
(-oo;-1)U(2;oo)
(8x + 8)(4x — 4) < 0
(-1;1)
x(x + 2)(x — 5) ≤ 0
[-2;5]
(x — 5)(x — 1)(x + 2) > 0
(-oo;-2)U(1;5)
(2x — 4)(4x + 4)(5x + 20) > 0
(-4;-1)U(-2;oo)
3)
(x — 4)/(x + 3) > 0
(-oo;-3)U(4;oo)
(x — 9)/(x + 2) ≥ 0
(-oo;-2)U(9;oo)
(x — 3)/(x + 8) > 0
(-oo;-8)U(3;oo)
(x + 3)/(x — 3) ≤ 0
[-3;3]