mohon dijawab ya pertanyaan
Matematika
aisyalarasati
Pertanyaan
mohon dijawab ya pertanyaan
1 Jawaban
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1. Jawaban Anonyme
Kelas 8 Matematika
Bab SPLDV
Buku tulis = a
Pensil = b
8a + 6b = 14.000 → dikali 3 → 24a + 18b = 42.000
6a + 5b = 11.200 → dikali 4 → 24a + 20b = 44.800
24a + 18b = 42.000
24a + 20b = 44.800
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-2b = -2.800
b = -2.800/-2
b = 1.400
8a + 6b = 14.000
8a + 6 . 1.400 = 14.000
8a = 14.000 - 8.400
a = 5.600/8
a = 700
Harga 5 buku tulis
5 . a = 5 . 700
5a = Rp 3.500,00