∣2x−5∣≤4|2 x-5| \leq 4∣2x−5∣≤4
∣5−2x∣≥4|5-2 x| \geq 4∣5−2x∣≥4
∣5−2x∣≤4|5-2 x| \leq 4∣5−2x∣≤4
∣5−2x∣≤14|5-2 x| \leq \frac{1}{4}∣5−2x∣≤41
