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Bear a two-digit number in mind.Without disclosing it, cunstruct a puzzle create two algebraic relations between the two digits of the number and solve the puzzle.

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I am a number, tell my identity, three times of me, add fifty. You still need forty to have a triple century. Let the number be x. (3x+50)+40 3x 3x x ​ =300 =300−90 =210 =70 ​ Hence, this is the answer.
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