document.write( "Question 480835: Am working on a problem for a spreadsheet design and modeling class and need to use simple algebra to solve the following problem:\r
\n" ); document.write( "\n" ); document.write( "9Xi + 6(200 - Xi) =1,566\r
\n" ); document.write( "\n" ); document.write( "The answer is 122, but I would like to know how the answer was determined.\r
\n" ); document.write( "\n" ); document.write( "Thank you Don at wvudonpost@aol.com \n" ); document.write( "
Algebra.Com's Answer #329237 by Theo(13342)\"\" \"About 
You can put this solution on YOUR website!
treat xi like it was a variable.
\n" ); document.write( "it's simpler to just call it x.
\n" ); document.write( "your problem is solved in the following manner:
\n" ); document.write( "original equation is:
\n" ); document.write( "9x + 6(200-x) = 1566
\n" ); document.write( "simplify by removing parentheses to get:
\n" ); document.write( "9x + 1200-6x = 1566
\n" ); document.write( "subtract 1200 from both sides of the equation to get:
\n" ); document.write( "9x - 6x = 1566 - 1200
\n" ); document.write( "combine like terms to get:
\n" ); document.write( "3x = 366
\n" ); document.write( "divide both sides of the equation by 3 to get:
\n" ); document.write( "x = 122
\n" ); document.write( "-----
\n" ); document.write( "i suspect xi is really the ith element in the x array.
\n" ); document.write( "as such, it would be denoted as x[i] or xi
\n" ); document.write( "that doesn't really matter.
\n" ); document.write( "the algebra is the same whether you are operating on x or xi or x[i] or xi\r
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