document.write( "Question 637353: a father 34 years older than his son tony.
\n" ); document.write( "their total ages is 54 years
\n" ); document.write( "how old will to tony be in 25 years time
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Algebra.Com's Answer #401582 by stanbon(75887)\"\" \"About 
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a father 34 years older than his son tony.
\n" ); document.write( "their total ages is 54 years
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\n" ); document.write( "Equations:
\n" ); document.write( "f + t = 54 years
\n" ); document.write( "f = t + 34
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\n" ); document.write( "how old will to tony be in 25 years time
\n" ); document.write( "---
\n" ); document.write( "Substitute for \"f\" and solve for \"t\":
\n" ); document.write( "t+34 + t = 54
\n" ); document.write( "2t = 20
\n" ); document.write( "t = 10 (Tony's age is now 10)
\n" ); document.write( "In 25 years Tony will be 35.
\n" ); document.write( "==============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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