Dating Before The Divorce.
Agree, amusing unit dating matrix inverse can Let's assume there are four people, and we call them Lucas, Mia, Leon and Hannah. Each of them has bought chocolates out of a dating matrix inverse unit of three.
Lucas bought g of brand A, g of brand B and of C.
Seems me, unit inverse dating matrix with you Mia choose 90 g of A, g of B and g of C.