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2 bk + 2 pnsl = 30.000 x 1 = 2 bk + 2 pnsl = 30.000
2 bk = 30.000
bk = 30.000/2 15.000
3 bk = 15.000 x 3 = 45.000
2b + 2p = 30.000
coret 2b nya. 1p - 20 = -1p
25.000 - 30.000 = -5000
berarti -1p : -5000
hasilnya 5000 ( 1 pensil)
subt ke pers 1.
2b + 1(5.000) = 25.000
2b + 5.000 = 25.000
25.000 - 5000 = 2b
20.000 : 2 = b
b = 10.000 (1 buku)
3 buku sama dengan 3(10.000) = 30.000