Matriks koefisien permintaan — Warung "Kopi & Teh Bu Sri" (respons kuantitas thd harga)
a — kopi thd harga kopi
2,0
b — kopi thd harga teh
1,0
c — teh thd harga kopi
1,0
d — teh thd harga teh
3,0
det(A) = ad − bc =
5,0
⌖ Contoh Default