document.write( "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. \n" ); document.write( "
Algebra.Com's Answer #551517 by josgarithmetic(39617)\"\" \"About 
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d for daughter Mary
\n" ); document.write( "m for Mother of Mary
\n" ); document.write( "f for Father of Mary\r
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\n" ); document.write( "\n" ); document.write( "2d=m;
\n" ); document.write( "f=m+5;
\n" ); document.write( "d+m+f=100.
\n" ); document.write( "Successively substitute until you have one variable's value solved, and then find the two other values.
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