Direct variation calculation

If $x$ varies directly as $y$ and $x = 8$ when $y = 15$ , find $x$ when $y = 10$ .

~2 minAnswer checked instantlydirect variationproportionality

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. III. Variation, Examples III, No. 1

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).