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MathNet 2002 — Part 01 Question 133

Math Olympiad Vault · MathNet 2002 — Part 01

Question 133

If $y=2x$ and $z=2y$, what is $x+y+z$ equal to?
  1. $5x$
  2. $4y$
  3. $3z$
  4. $\frac{7}{2}y$
  5. $\frac{7}{3}z$.