You can put this solution on YOUR website! .
six year ago the sum of the ages of two sisters was 22 and the product of their age was 21.
find the ages of elder sister
~~~~~~~~~~~~~~~~
HINT: Six years ago, the sisters were 21 and 1 years old.
I sincerely hope this is an attempt to translate a problem into English from another language.... The language, grammar, and punctuation are atrocious.
If the product of two ages is 21, then the ages are either 7 and 3 or 21 and 1. The sum of 1 and 21 is 22.
So if the statement of the problem is supposed to say that the product of their ages is 21 and the sum is 22, then the older sister is 21 and the younger sister is 1.
But I have no idea if that is what the problem is supposed to say.