document.write( "Question 828079: Father is three times as old as his son. 5 years ago father's age was four times his son's age then. find their present ages. \n" ); document.write( "
Algebra.Com's Answer #499063 by richwmiller(17219)\"\" \"About 
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f=3s
\n" ); document.write( "f-5=4*(s-5)
\n" ); document.write( "3s-5=4s-20
\n" ); document.write( "15=s
\n" ); document.write( "45 =f\r
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