Răspuns :
|2x-5| ≤ 9
-9 ≤ 2x-5 ≤ 9 /+5
-4 ≤ 2x ≤ 14 /:2
-2 ≤ x ≤ 7
x € [-2; 7]
|2x+1| < 7
-7 < 2x+1 < 7 /-1
-8 < 2x <6 /:2
-4 < x < 3
x € (-4; 3)
(-4; 3) U [-2; 7] = (-4; 7]
-9 ≤ 2x-5 ≤ 9 /+5
-4 ≤ 2x ≤ 14 /:2
-2 ≤ x ≤ 7
x € [-2; 7]
|2x+1| < 7
-7 < 2x+1 < 7 /-1
-8 < 2x <6 /:2
-4 < x < 3
x € (-4; 3)
(-4; 3) U [-2; 7] = (-4; 7]