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Question

Find the value of k, if x=1 and y=2 is a solution of the equation 4xky=10.

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Solution

Given equation is 4xky=10 --------(1)

also given that x=1 ------(2)

and y=2 ------(3)

substituting (2) and (3) in (1) we get

4(1)k(2)=10

42k=10

2k=104

2k=14

k=142

k=7

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