Question

Задание - 19 баллов Удачи!

Answer 1

4. а) 2x > 4x + 6

4x + 3 < 2x + 1

2x - 4x > 6

4x - 2x < 1 - 4

-2x > 6

2x < -3

x < -3

x < -3/2

=> x ∈ (-∞; -3)

б)3x + 7 > 7x - 9

x - 3 > -3x + 1

3x - 7x > -9 - 7

x + 3x > 1 + 3

-4x > -16

4x > 4

x < 4

x > 1

x ∈ (1; 4)

5. 2x - 8 ≥ 2x

3x - 15 < 16 - 3x

2x - 2x ≥ 8

3x + 3x < 16 + 15

0 ≥ 8

6x < 31

нет решений.

6. 4*(x + 11) < -2*(x + 8)

4x - 10 ≤ 7*(x - 7) + 9

4x + 44 < -2x - 16

4x - 10 ≤ 7x - 49 + 9

4x + 2x < -16 - 44

4x - 3x ≤ -40 + 10

6x < -60

x ≤ -30

x < -30

x ≤ -30

x ∈ (-∞; -30)