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October 21, 2014

October 21, 2014

Posted by **shankar** on Friday, July 19, 2013 at 10:14am.

- vivekanand H s SCHOOL -
**Steve**, Friday, July 19, 2013 at 11:32amb-a=10

(b-15) = 2(a-15)

(a+10-15) = 2(a-15)

a-5 = 2a-30

a = 25

So, the sisters are 25 and 35

check:

15 years ago they were 10 and 20

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