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can this be right?

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paddycar | 12:06 Fri 09th Jun 2006 | Quizzes & Puzzles
1 Answers
Three times a mystery number was increased by 100, and the result was 12 less than the number. Find the mystery number.
56
-56
28
-28
2.8
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Answer is -56.

3x + 100 = x-12
2x = -112
x = -56

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