Tentukanlah penyelesaian pertidaksamaan |2 – 5x| ≤ 10 !​

Jawaban:

|2 – 5x| ≤ 10

-10 ≤ 2 – 5x ≤ 10

-10 – 2 ≤ -5x ≤ 10 – 2

-12 ≤ -5x ≤ 8

12/5 ≤ x ≤ – 8/5

cara lain :

|2 – 5x| ≤ 10

2 – 5x = 10

-5x = 10 – 2

-5x = 8

x = – 8/5

-2 + 5x = 10

5x = 10 + 2

5x = 12

x = 12/5

Hp = {x | x ≤ 12/5, x E R}