International trade

Using the information below, determine which country (Home or Foreign) exports good X, how much it exports, and at what price.
Home: Q = 40 - 10P, Q = 20 + 10P
Foreign: Q = 50 - 10P, Q = 10 + 10P
Please help, trying to understand if i use Import demand where is home demand-supply and export supply which is foreign supply minus demand and if its safe to assume that boths Q's are the country demand and supply