SOLUTION: A mother is 6 times older than her daughter is today, and in 20 years from today, the mother will be twice the child's age. What is the daughter's age today? And, what is the equ

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Question 1839: A mother is 6 times older than her daughter is today, and in 20 years from today, the mother will be twice the child's age. What is the daughter's age today? And, what is the equation for solving this problem?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
Definitions:
Let m = mothers age today
Let d = daughters age today
So, we know m = 6d --1
and (m+20) = 2(d+20) --2
sub 1 into 2, giving (6d+20) = (2d+40)
then re-arragne to give 4d = 20. therefore d=5 and hence m=30
cheers
Jon