SOLUTION: Sister is 10 yrs older thn brother , after 3 yrs sister is twice thn brother so what r the ages of both..........???

Question 789602: Sister is 10 yrs older thn brother , after 3 yrs sister is twice thn brother so what r the ages of both..........???
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
= age of the brother, in years, at the start of the 3 years
= age of the sister, in years, at the start of the 3 years
= age of the brother, in years, after 3 years
= age of the sister, in years, after 3 years

If after 3 years the sister is twice as old as the brother,

Then, solving step by step:
-->-->-->-->-->-->
That means:
= age of the sister, in years, at the start of the 3 years
= age of the brother, in years, after 3 years
= age of the sister, in years, after 3 years
At the start the brother is 7 years old, and the sister is 17.
After 3 years, the brother is 10, and the sister is 20.

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