document.write( "Question 836347: My date of birth is 1978 but I don't know about my father age when I was in 3 year my father age is 30 and my mom age is 27 so how I know my father birth year \n" ); document.write( "
Algebra.Com's Answer #504229 by ankor@dixie-net.com(22740)\"\" \"About 
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My date of birth is 1978 but I don't know about my father age.
\n" ); document.write( " when I was in 3 year my father age is 30 and my mom age is 27
\n" ); document.write( " so how I know my father birth year
\n" ); document.write( ":
\n" ); document.write( "You were 3 yrs old in 1981, your dad was 30, therefore
\n" ); document.write( "1981 - 30 = 1951 was dad's birth yr
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