Bantuu kakk pake caranya kalau bisa​

Jawaban:

20x+20y+20z= 36.000—[x+y+z=1800]

25x+10y+25z=42500 ( 5x+2y+5z=8500)

20x+25y+25z=53500 ( 4x+5y+5z=10700)

Catatan =

Harga Barang jenis 1 = x

Harga Barang jenis 2 = y

Harga Barang jenis 3 = z