Competition problem — Algebra — Maths Olympiad Prep

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Algebra Difficulty 1.9 Junior Find the answer

If $x=3$ , $y=2x$ , and $z=3y$ , what is the value of $z$ ?

Your answer

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

Solution

Since $x=3$ and $y=2x$ , then $y=2 \cdot 3=6$ . Since $y=6$ and $z=3y$ , then $z=3 \cdot 6=18$ .

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