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Evalute the determinants in queations 1 ...

Evalute the determinants in queations 1 and 2 :
Find the values of x, if
(i) `|{:(2,4),(5,1):}|=|{:(2x,4),(6,x):}|`
(ii)`|{:(2,3),(4,5):}|=|{:(x,3),(2x,5):}|`

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