document.write( "Question 517673: 8 years ago a dad was 8 times older than his son.\r
\n" ); document.write( "\n" ); document.write( "Today their combined ages are 52, how old are they today? \n" ); document.write( "
Algebra.Com's Answer #344914 by Maths68(1474)\"\" \"About 
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Let
\n" ); document.write( "Present age of Dad = d
\n" ); document.write( "Present age of Son = s\r
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\n" ); document.write( "\n" ); document.write( "Today their combined ages are 52
\n" ); document.write( "d+s=52
\n" ); document.write( "d=52-s.........(1)
\n" ); document.write( "8 years ago a dad was 8 times older than his son.
\n" ); document.write( "d-8=8(s-8)
\n" ); document.write( "d-8=8s-64
\n" ); document.write( "d=8s-64+8
\n" ); document.write( "d=8s-56.......(2)
\n" ); document.write( "Put the value of d from (1) to (2)
\n" ); document.write( "52-s=8s-56
\n" ); document.write( "-s-8s=-56-52
\n" ); document.write( "-9s=-108
\n" ); document.write( "-9s/-9=-108/-9
\n" ); document.write( "s=12
\n" ); document.write( "Put the value of s in (1)
\n" ); document.write( "d=52-12
\n" ); document.write( "d=40\r
\n" ); document.write( "\n" ); document.write( "Present age of Dad = d = 40 years old
\n" ); document.write( "Present age of Son = s = 12 years old\r
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