document.write( "Question 1170627: John is five times as old as nick. In 15 years time,john will be three times as old as nick. How old is john?
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Algebra.Com's Answer #795487 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "let John's age be \"x\" and Nick's age \"y\"\r
\n" ); document.write( "\n" ); document.write( "if John is five times as old as Nick, we have\r
\n" ); document.write( "\n" ); document.write( "\"x=5y\".......eq.1\r
\n" ); document.write( "\n" ); document.write( "if in \"15\" years time, John will be three times as old as Nick, we have\r
\n" ); document.write( "\n" ); document.write( "\"x%2B15=3%28y%2B15%29\".......eq.2...substitute \"x\" from eq.1\r
\n" ); document.write( "\n" ); document.write( "\"5y%2B15=3%28y%2B15%29\"....solve for \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"5y%2B15=3y%2B45\"\r
\n" ); document.write( "\n" ); document.write( "\"5y-3y=45-15\"\r
\n" ); document.write( "\n" ); document.write( "\"2y=30\"\r
\n" ); document.write( "\n" ); document.write( "\"y=15\"\r
\n" ); document.write( "\n" ); document.write( " John is \"15\" years old\r
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