Solve $\dfrac{x}{x + 4} = \dfrac{1}{2}$.

Solve $\dfrac{x}{x + 4} = \dfrac{1}{2}$.
  1. $4$
  2. $2$
  3. $8$
  4. $1$

Solution

$2x = x + 4 \Rightarrow x = 4$.

Asked in: IMO

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