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The ages of two friends Ani and Biju differ by 3 years. Ani’s age is twice as old as Biju. Form equations to find the ages of Ani and Biju.
(Assume age of Ani as 'x' yrs and Biju as 'y' yrs. )

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-x - y = 3 ---- (1)

-x - 2y = 0 ---- (2)

x - y = -3 ---- (1)

x - 2y = 0 ---- (2)

x + y = 3 ---- (1)

x + 2y = 0 ---- (2)

x - y = 3 ---- (1)

x - 2y = 0 ---- (2)

answer is A.

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Detailed Solution

Let the ages of Ani be 'x' yrs and Biju be 'y' yrs.

As per 1st condition, x - y = 3 ---- (1)

As per 2nd condition, x = 2y --> x - 2y = 0 ---- (2)

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