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* -4 ≤ 2x - 3
-1 ≤ 2x
-1/2 ≤ x
* 2x - 3 ≤ 4
2x ≤ 7
x ≤ 3,5
HP = {x| -1/2 ≤ x ≤ 3,5}
⇒ -4 ≤ 2x - 3
-1 ≤ 2x
-1/2 ≤ x
⇒ 2x - 3 ≤ 4
2x ≤ 7
x ≤ 3,5
hp= {x| -1/2 ≤ x ≤ 3,5}