հանրահաշիվ

x — 1 > 0 x + 5 < 0 x — 0,5 < 0 3 + x > 0 7 + x > 0 x — 4/3 < 0
x > 1 x < -5 x < 0,5 x > -3 x > -7 x < 4/3
x ∈ (1;∞) x ∈ (-∞;-5) x ∈ (∞;0,5) x ∈ (-3;∞) x ∈ (-7;∞) x ∈ (∞;4/3)

x — 2 > 0.2 x — 3.5 < 4 2.1 + x < 7 x — 2 > -0.6 x + 10.7 > 7.9 5,013 + x < 0.13
x > 2.2 x < 7.5 x < 4.9 x > 1.4 x > -2.8 x < -5
x ∈ (2.2;∞) x ∈ (∞;7.5) x ∈ (∞;4.9) x ∈ (1.4;∞) x ∈ (-2.8;∞) x ∈ (∞;-5)

2x > 4 7x < -14 -5x < 100 -3x < 9 -3x > -6
x > 2 x < -2 x > -20 x > -3 x < 2
x ∈ (2;∞) x ∈ (∞;-2) x ∈ (-20;∞) x ∈ (-3;∞) x ∈ (∞;2)