Mathematics, 16.06.2020 09:57, gl648809

Jonathan collects postcards and stamps. The number of postcards in his collection is 12 more than the number of stamps. He has 39 postcards in all. If Jonathan has x stamps, which equation represents this situation and how many stamps does he have?

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Jonathan collects postcards and stamps. The number of postcards in his collection is 12 more than th...