SOLUTION: A mother is 20 years older than her son. Ten years ago she was 3 times as old as her son then. Find their present ages.

Question 886167: A mother is 20 years older than her son. Ten years ago she was 3 times as old as her son then. Find their present ages.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A mother is 20 years older than her son. Ten years ago she was 3 times as old as her son then. Find their present ages.
***
let x=son's age
x+20=mother's age
..
10 yrs ago:
x-10=son's age
x+20-10=x+10=mother's age
x+10=3(x-10)
x+10=3x-30
2x=40
x=20
x+20=40
son's age=20
mother's age=40
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