Does anyone know how to do products

On a architect's drawing of a house, 1 inche representa 1.5

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$