SOLUTION: a mother is 21 years older than her new born daughter how will the daughter be when her age is 1/4 that of her mother's?

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: a mother is 21 years older than her new born daughter how will the daughter be when her age is 1/4 that of her mother's?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 731087: a mother is 21 years older than her new born daughter how will the daughter be when her age is 1/4 that of her mother's?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The difference in their ages will always be +21+ years
So the mother's age is always +d+%2B+21+
Let +d+ = daughter's age when her age is 1/4 that of her mother's
+d+=+%281%2F4%29%2A%28+d+%2B+21+%29+
+4d+=+d+%2B+21+
+3d+=+21+
+d+=+7+
The daughter will be 7 when her age is 1/4 that of her mother's
check:
Mother will be +7+%2B+21+=+28+
and +7+=+%281%2F4%29%2A28+
OK