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Algebra Difficulty 1.0 Junior Find the answer United Kingdom

Amrita thinks of a number. She doubles it, adds $9$ , divides her answer by $3$ and finally subtracts $1$ . She obtains the same number she originally thought of. What was Amrita's number?

(A) $1$ (B) $2$ (C) $3$ (D) $4$ (E) $6$

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