Find number abc
If 3b7b6 - 19a3a = 11c7c find number abc. Multiple solutions may exist.Correct answers: 39
The first user who solved this task is Djordje Timotijevic.
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Stove patentIn 1842, Salvin Kellogg patented his air-heating stove design (U.S. No. 2,556) |