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brarti :
kedua: x+2
ketiga = x + 4
x + x+2+x+4 = 54
3x + 6 = 54
3x = 54-6
3x = 48
x = 48/3
x = 16
terbesar = x + 4 = 16+4 = 20
terkecil = x = 16
Jumlah = 36