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3x + 9 = 75
3x = 66
x = 22
(x + 1) + (x + 5) = 23 + 27 = 50
3n + 6 = 75
3n = 75 - 6
3n = 69
n = 23
23 + (23 + 2) + (23 + 4)
= 23 + 25 + 27
= 48 + 27
= 75
Jumlah bilangan terkecil dan terbesar =
23 + 27 = 50
(Maaf kalau salah)