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6t - 3 ≤ 2t + 9
6t - 2t ≤ 9 + 3
4t ≤ 12
t ≤ 12/4
t ≤ 3
Maaf, kalau salah..
6t - 3 ≤ 2t + 9
6t - 2t ≤ 9 + 3
4t ≤ 12
t ≤12/4
t ≤ 3