SOLUTION: In an interviwe mary was asked how old is she she said i dont know but i know am half my mother. ok how old is your mother? she said i dont know but i know my father is 5 years ol

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Question 908986: In an interviwe mary was asked how old is she she said i dont know but i know am half my mother. ok how old is your mother? she said i dont know but i know my father is 5 years older than my mother, then she asked how old is your father? she said i dont know but i know when you add all our ages together it wil gives us 100. how old are they.
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
d for daughter Mary
m for Mother of Mary
f for Father of Mary

2d=m;
f=m+5;
d+m+f=100.
Successively substitute until you have one variable's value solved, and then find the two other values.