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= 1/2x - 2 ≤ 4+4/5x
= 5-20x ≤ 40x+8
= -20x ≤ 40x+3
= -60x ≤ 3
x ≥ 1/20
5x - 20 krgdarisamadgn 40 + 8x
5x - 8x krg dari sma dgn 40 + 20
-3x krg dari sma dgn 60
x krg dari samadgn -20
jadi {x kurangdari sama dengan -20, x bilangan bulat)