# A man invested $$\150$$ in the stock market. During the first week, he lost $$\45$$. During the second week, he tripled his money. How much does he have at the end of the second week?

$$\315$$

Explanation

First, calculate how much he had at the end of the first week: $$\150 –\45 =\105$$. Since he tripled his money, it is then necessary to multiply this value by 3: $$\105 \times 3 = \315$$