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s = sawo
2j + 5s = 6400 | x5 | 10j + 25s = 32000 2j + 5s = 6400
5j + 3s = 8400 | x2 | 10j + 6s = 16800 - 2j + 5(800) = 6400
19s = 15200 2j + 4000 = 6400
s = 15200/19 2j = 6400 - 4000
= 800 j = 2400/2
= 1200
Harga 7j + 4s
= 7(1200) + 4(800)
= 8400 + 3200
= 11600
Kembalian
= 15000 - 11600
= Rp 3400
5 jambu + 3 sawo = 8.4 rb
harga jambu > harga sawo
2 jambu + 5 sawo = 6.4 rb
(2)1.2 rb + (5) 800 = 6.4 rb
2.4 rb + 4 rb = 6.4 rb
5 jambu + 3 sawo = 8.4 rb
(5) 1.2 rb + (3) 800 = 8.4 rb
6 rb + 2.4 rb = 8.4 rb
jadi,
7 jambu + 4 sawo = (7) 1.2 rb + (4) 800
8.4 rb + 3.2 rb = 11.6 rb
15 rb - 11.6 rb = 3.4 rb
maaf gatau cara umumnya