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Jawabannya:Mapel. : Matematika
Babb. : Perbandingan dan Aritmatika Sosial
Sub Bab : Perbandingan
Pembahasan:
Misal :
x = Ayam
y = Itik
Maka :
4x + 3y = 225.000 |×5|
3x + 5y = 315.000 |×3|
20x + 15y = 1.125.000
9x + 15y = 945.000
------------------------------- -
11x = 180.000
x = 180.000/11
x = Rp. 16.363 (Ayam)
.
.
.
4x + 3y = 225.000 |×3|
3x + 5y = 315.000 |×4|
12x + 9y = 675.000
12x + 20y = 1.260.000
-------------------------------- -
-11y = -585.000
y = -585.000/-11
y = Rp. 53.181 (Itik)
Maka :
Harga 1 Ayam dan 1 Itik adalah :
1x + 1y
= 1(16.363) + 1(53.181)
=16.363 + 53.181
= Rp. 69.544 → Jwbnya
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