SOLUTION: In a years, A will be n times as old as B then; and b years ago, A was m times as old as B. Find their ages at present.

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Question 345473: In a years, A will be n times as old as B then; and b years ago, A was m times as old as B. Find their ages at present.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Let A = A's present age
Let B = B's present age
;
In a years, A will be n times as old as B then;
A + a = n(B + a)
A + a = nB + na
A = nB + na - a; is A's present age

and b years ago, A was m times as old as B.
A - b = m(B - b)
Find B
m(B - b) = A - b
B - b = %28%28A+-+b%29%29%2Fm
B = %28%28A+-+b%29%29%2Fm + b; is B's present age

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