Question 428078: When Mrs Lee was 44 years old, her son was twice her daughter's age.Mrs lee will be twice her son's age when her daughter is 26 years old.How old will Mrs Lee be when her daughter is 20 years old?
Answer by htmentor(1343)   (Show Source):
You can put this solution on YOUR website! When Mrs. Lee was 44, her son was twice her daughter's age.
Let d = her daughter's age when Mrs. Lee was 44.
Then her son was 2d yrs. old when Mrs. Lee was 44.
When her daughter was 26, Mrs. Lee was twice her son's age.
This means 26 - d years have passed since Mrs. Lee was 44.
So, if her daughter was 26 at this time, that means her son was 2d + (26 - d)
And, Mrs. Lee's age at this time was 44 + (26 - d)
Mrs. Lee was twice her son's age at this time:
44 + (26 - d) = 2(2d + (26 - d))
Solve for d:
70 - d = 2d + 52 -> 3d = 18 -> d = 6
So, Mrs. Lee's age when her daughter was 26 is 44 + 26 - 6 = 64 yrs. old
Her daughter was 20 yrs. old 6 years earlier.
Thus, Mrs. Lee's age when her daughter was 20 was 64 - 6 = 58 years old
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