How do you solve this math problem: Sales for a business were 3 million dollars more the second year than the first, and sales for the third year...

How do you solve this math problem:

Sales for a business were 3 million dollars more the second year than the first, and sales for the third year were double the sales for the second year. If sales for the third year were 38 million dollars, what were sales, in millions of dollars, for the first year?