Present ages of Ram and Rahim are in ratio of 6:5. 6yrs ago, Rahim was twice as old as Ram. Find the present age of Rahim.

Let the present age of ram be x and of Rahim be y :
x/y = 6/5
5x = 6y
5x-6y = 0
6 years ago;

2(x-6) = (y-6)
2x - 12 = y-6
2x-y= 6


12x-6y=36
5x-6y = 0
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7x = 36

x=36/7