harga 7 kg duku dan 5 kg rambutan Rp 46000 jika membeli 2 kg duku dan 3 kg rambutan hanya Rp 21000 Kalimat Matematikanya Adalah

7d +5r = 46000
2d + 3r =21000

Misal : Duku = x
Rambutan = y
7x+5y =46000 | x3 | = 21x+15y = 138.000
2x+3y =21000 | x5 | = 10x+15y = 105.000
______________-
11x = 33.000
x = 3.000
7x+5y =46000 | x2 | = 14x+10y = 92.000
2x+3y =21000 | x7 | = 14x+21y = 147.000
______________-
-11y = 55.000
y = 5.000
Jadi Harga 1kg Duku = Rp 3.000
1kg Rambutan = Rp 5.000