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Difference between revisions of "Variable/Problems"

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Latest revision as of 21:34, 15 November 2007

Preintroductory

P1

Problem

What number, when added to $7$, gives a sum of $10$?

Solution

We set up the equation: $x+7=10\Rightarrow x+7-7=10-7\Rightarrow x=\boxed{3}$

Introductory

Intermediate

Olympiad

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