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maka,
y >= -6
Konsepnya sama seperti 2y - 11 = 7y + 19
=> 2y - 11 ≤ 7y + 19
=> 2y - 7y ≤ 19 + 11
=> -5y ≤ 30
=> -y ≤ 6 atau 6 ≥ y