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Solve the following pairs of equations by reducing them to a pair of linear equations:(i) `1/(2x)+1/(3y)=2`; `1/(3x)+1/(2y)=(13)/6` (ii) `2/(sqrt(x))+3/(sqrt(y))=2`; `4/(sqrt(x))-9/(sqrt(y))=-1`(iii) `4/x+3y=14`; `3/x-4y=23`

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(i) Give equations are: Let `1/x = p` and `1/y = q` , then the equations change as follows:
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