Question
Mr. Simon saved a total of $8638 in 4 months. In the first 2 months, he saved $1215 each month. In the 3th month, he saved $1515. How much did he save in the 4th month?
4 m

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Mr. Simon saved a total of $8638 in 4 months. In the first 2 months, he saved $1215 each month. In the 3th month, he saved $1515. How much did he save in the 4th month?