3|2x-5|>21
3|2x-5|>21 divide both sides by 3
l 2x - 5 l > 7 and we can write
-7 > 2x - 5 > 7 add 5 to both sides
-2 > 2x > 12 divide both sides by 2
-1 > x > 6
So.....the solution set is ( -∞, -1) U (6, ∞ )
