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?
Detailed 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 × 3 = 315
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