Answer:
He paid 5,000 for the old home, which was the original price of it.
And he paid 15,000 for the new home.
Explanation
Twice the selling price of his old one, the selling price was 7,000
7,000 * 2 = 14000.
14000 + 1000 = 15000.
15,000 is three times more than he originally paid for his old home.
n Purchased a new one for 1,000 more than twice the selling price.