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Let Anitha's and Manisha's age be x and y.
A/c to given conditions , 'The age of Anitha four times more than her younger sister Manisha. '
=> x = 4y ... (1)
and 'After 4 years the Anitha's age be doubled the age of Manisha'
=> x + 4 = 2 ( y + 4 )
=> x + 4 = 2y + 8
=> x = 2y + 4 ... (2)
sub. (1) in (2) , we get ,
=> 4y = 2y + 4
=> 2y = 4
=> y = 2
sub. this in (1) , we get ,
=> x = 4(2)
=> x = 8
So the present age of Anitha is x = 8
and present age of Manisha is y = 2
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