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= 6t - 3 < 4t + 6
6t - 4t < 6 + 3
2t < 9
t < 9/2
t < 4,5
b. 4n + 2 + 2n + 1 ≤ 6n + 3
4n + 2n - 6n ≤ 3-2-1
0 ≤ 0