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Verified answer
Kelas 6 MatematikaBab Perbandingan
(1 - 45% - 2/5) x a = 15.000
(1 - 0,45 - 0,4) x a = 15.000
0,15 x a = 15.000
a = 15.000 / 0,15
a = Rp 100.000,00
Uang untuk membeli buku
= 100.000 x 45%
= Rp 45.000,00