document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190674>Question 1190674</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Patty is 12 years old, she is 4 years more than twice as old as John. How old is John ? </SPAN>\n" );
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document.write( "Using formal algebra....<br><BR>\n" );
document.write( "x = John's age (what we are looking for)<BR>\n" );
document.write( "2x = twice John's age<BR>\n" );
document.write( "2x+4 = 4 more the twice John's age (Patty's age)<br><BR>\n" );
document.write( "Patty's age is 12:<br><BR>\n" );
document.write( "2x+4=12<BR>\n" );
document.write( "2x=8<BR>\n" );
document.write( "x=4<br><BR>\n" );
document.write( "ANSWER: John is 4 years old<br><BR>\n" );
document.write( "Informally -- to get some good exercise in logical reasoning....<br><BR>\n" );
document.write( "Subtract 4 from Patty's age to get 8 -- to account for the \"4 years older\"; then<BR>\n" );
document.write( "Divide the 8 by 2 to get 4 -- to account for the \"twice as old as\"<br><BR>\n" );
document.write( "Again of course the answer is 4.<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );