document.write( "Question 1189663: Kelvin is 4 years younger than Tony \n" ); document.write( "
Algebra.Com's Answer #821094 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "let Kelvin's age be \"K\" and Tony's age \"T\"\r
\n" ); document.write( "\n" ); document.write( "if Kelvin is \"4\" years younger than Tony, we have\r
\n" ); document.write( "\n" ); document.write( "\"K=T-4\"
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