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Question:

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?

A $315
Explaination

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:
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