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|4 - 5x| > 2²
|4 - 5x|> 4 dengan 4 -5 x ≠ 0 --> x ≠ 4/5
4 - 5x > 4 atau 4 - 5x < - 4
-5x > 0 atau -5x < - 8
x < 0 atau x > 8