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2 - 4 - x ≥ -22
-2 - x ≥ -22
- x ≥ -22 + 2
- x ≥ -20
x ≤ -20/-1 [tanda berubah jika pembaginya negatif]
x ≤ 20
x ={.......,15,16,17,18,19,20}