Question

Resuelve las inecuaciones siguientes:
2.x +8 < 4
5.x – 11 > 2.x - 20
4.(x + 3) ≤ 2.x
5.(- 2.x + 4) ≤ 3.(3.x - 7)

Answer 1

Respuesta:

2.x +8 < 4

2x < 4  - 8

2x < - 4

x < 4 /2

x < 2

5.x – 11 > 2.x - 20

5x - 2x > - 20  + 11

3x > 9

x > 9/3

x > 3

4.(x + 3) ≤ 2.x

4x + 12 ≤ 2x

4x - 2x ≤ -12

2x ≤ -12

x ≤ -12/2

x  ≤ -6

5.(- 2.x + 4) ≤ 3.(3.x - 7)

-10x + 20 ≤ 9x - 21

10x - 9x ≤ -21 + 10

x ≤ 11