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MATH / In the statement below, the two blanks can be filled by positive single-digit…

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problem

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?
Plain-text mathematical notation (without MathML)
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?
Original LaTeX notation
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?

level

Level 5

type

Number Theory

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