Edwin's explanation of your error:
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document.write( "I'm struggling on 2 algebra problems I have. If you could please help me I would greatly appreaciate it.
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document.write( "1) The sum of two numbers is 43. One number plus three times the other number is 65. What are the numbers?
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document.write( "x + x = 43
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document.write( "x + 3x = 65
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document.write( "I'm afraid that's wrong. Your mistake is trying to use the SAME\r\n" );
document.write( "letter x for two DIFFERENT numbers. You must use DIFFERENT \r\n" );
document.write( "letters for DIFFERENT numbers.\r\n" );
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document.write( "First number = 
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document.write( "Second number = 
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document.write( "
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document.write( "Solve the first equation for \r\n" );
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document.write( "
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document.write( "Substitute 
for is the second equation,\r\n" );
document.write( "then solve for \r\n" );
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "
\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Substitute 
for in \r\n" );
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document.write( "
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document.write( "
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document.write( "------------------------\r\n" );
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document.write( "2) The difference between two numbers is 55. Four times the smaller number plus five times the larger number is 176. What are the numbers?
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document.write( "z = smaller number
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document.write( "y = larger number
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document.write( "x - x = 55
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document.write( "4z + 5y = 176
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document.write( "Hmm! Now your equation 
is OK, but your first \r\n" );
document.write( "equation should not have involved at all, but 
\r\n" );
document.write( "and only. And again, on top of that, your mistake \r\n" );
document.write( "was using the SAME letter for two DIFFERENT quantities. \r\n" );
document.write( "You must use DIFFERENT letters for DIFFERENT quantities, never \r\n" );
document.write( "the SAME letter. Your first equation should have been \r\n" );
document.write( "
\r\n" );
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document.write( "So you have this system:\r\n" );
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document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Solve the first equation for \r\n" );
document.write( "
\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Substitute 
for is the second equation,\r\n" );
document.write( "then solve for \r\n" );
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "
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document.write( "\r\n" );
document.write( "Substitute 
for in \r\n" );
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document.write( "\r\n" );
document.write( "
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document.write( "
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document.write( "Edwin\r\n" );
document.write( "AnlytcPhil@aol.com\r\n" );
document.write( "
\r
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document.write( "![\"\"](\"/images/stars/stars-13.gif\")
