SOLUTION: A mother is 20 years older than her daughter. Five years from now, she will be thrice as her daughter will then be. Find their present ages.

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Question 853314: A mother is 20 years older than her daughter. Five years from now, she will be thrice as her daughter will then be. Find their present ages.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.M=D%2B20
2.M%2B5=3%28D%2B5%29
Substitute eq. 1 into eq. 2,
D%2B20%2B5=3D%2B15
D%2B25=3D%2B15
-2D=-10
D=5
Then from eq. 1,
M=5%2B20
M=25