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1 kg daging sapi dimisalkan x
1 kg ayam potong dimisalkan y
1 kg daging sapi + 2 kg ayam potong = 94.000 (x + 2y = 94.000)
3 kg ayam potong + 2 kg daging sapi = 167.000 (3y + 2x = 167.000)
Jadi, x + 2y = 94.000 dan 2x + 3y = 167.000 (B)
Untuk nomor 18
1 pensil dimisalkan a
1 buku dimisalkan b
5 pensil + 2 buku = 26.000 (5a + 2b = 26.000)
3 pensil + 4 buku = 38.000 (3a + 4b = 38.000)
Jadi, 5a + 2b = 26.000 dan 3a + 4b = 38.000 (B)