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History, 23.03.2020 02:20 alundriaf6206

In the statement below, the two blanks can be filled by positive single-digit numbers in such a way that the statement is always true:

$$\text{If }2x\equiv y+5\ (\bmod\ 9)\text{, then }x\equiv \underline{\ \ \ }\,y+\underline{\ \ \ }\ (\bmod\ 9).$$What is the product of the two digits that go in the blanks?

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