13 2dAngka Erek Erek 13 di Buku Mimpi 2D 13 Bergambar yang mengulas Tafsir seribu mimpi 13 Abjad + Gambar Lengkap.On putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.