An investment of ?$140,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned? 8% interest, the second? 6%, and the third? 9%. Total interest from the investments was $10440. The interest from the first investment was 2 times the interest from the second. Find the amounts of the three parts of the investment.
What is the amount of the first part of the? investment?