What plus what number equals 39?

Answer 1

Something's missing from your question. There are 20 answers to your question.

39 + 0 = 39

38 + 1 = 39

37 + 2 = 39

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19 + 20 = 39

Answer 2

Well, honey, any number added to 39 will give you 39. So, technically, 0 plus 39 equals 39. But if you want to be fancy, you could also say 39 plus 0 equals 39. Math is funny like that.