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CEMC Gauss (Grade 8), 2007

Algebra Difficulty 1.0 Junior Find the answer Canada

The number nn is doubled and then has yy added to it. The result is then divided by 2 and has the original number nn subtracted from it. The final result is

(A) nn (B) yy (C) n+yn+y (D) n+y2\frac{n+y}{2} (E) y2\frac{y}{2}

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.