How many cars are owned by the English businessman?

Let us assume that the number of Canadian institute they have donated is x, then that from Brazil is x - 2. On the basis of data above table is drawn. From information 10, residents of Canada, England and Brazil are staying in alternate rooms in that order starting from left. Though room numbers of residents of Canada, England and Brazil can also be 102, 104 and 106 respectively.
12 cars are owned by the English businessman.