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If x and y vary inversely as each other and x = 5, when y = 15, find x when y = 12.

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If x and y vary inversely as each other and x = 5, when y = 15, find x when y = 12.

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x 5
y 15 12

We know k = xy

5 × 15 = x × 12

x = (5×15)/12

= 25/4

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