Mathematics, 01.07.2019 13:30 monkeygaming274

19 people getting off the train can be represented by -19, and 17 people getting on the train as +17. -19 + 17 = 2, meaning that there was a net loss of two people. if there are 63 people on the train now, that means there were 65 to begin with.

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19 people getting off the train can be represented by -19, and 17 people getting on the train as +17...