13 2dOn putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.3 bedroom house for sale at 13 Francis Street, Mascot, NSW 2020, Contact Agent. View 11 property photos, floor plans and Mascot suburb