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Verified answer
Misalbil. pertama = a
bil. kedua = a + 1
bil. ketiga = a + 2
bil. keempat = a + 3
a + a + 1 + a + 2 + a + 3 = 122
4a + 6 = 122
4a = 122 - 6
4a = 116
a = 116 / 4
a = 29
Jawaban B