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What is the missing value of the yellow box?

What is the missing value of the yellow box?-example-1
User Barno
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\begin{array}{ccll} Trains&Planes\\ \cline{1-2} 3 & 8\\ 12& x \end{array} \implies \cfrac{3}{12}~~=~~\cfrac{8}{x} \implies \cfrac{ 1 }{ 4 } ~~=~~ \cfrac{ 8 }{ x }\implies x=32

User Okarin
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25 votes

Answer:

32

Explanation:

User Vitmalina
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