If y varies inversely as x and y = 12 when x = 3, how do you find x when y = 18?

Anito49

Anito49

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2022-09-01

If y varies inversely as x and y = 12 when x = 3, how do you find x when y = 18?

Answer & Explanation

muilasqk

muilasqk

Beginner2022-09-02Added 10 answers

As y varies inversely as x, y 1 x or y = k × 1 x
i.e. x × y = k
Hence as when x=3,y=12#, we have
k = 3 × 12 = 36
and therefore when y=18
we have x × 18 = 36
or x = 36 18 = 2

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