document.write( "Question 159200This question is from textbook Prentice Hall
\n" ); document.write( ": 3a - 2b + 7c = 13
\n" ); document.write( "a + 8b - 6c = -47
\n" ); document.write( "7a - 9b - 9c = -3
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Algebra.Com's Answer #117380 by midwood_trail(310)\"\" \"About 
You can put this solution on YOUR website!
This is not trigonometry.\r
\n" ); document.write( "\n" ); document.write( "What you have here is called a system of linear equations in 3 variables.\r
\n" ); document.write( "\n" ); document.write( "This is algebra and algebra alone.\r
\n" ); document.write( "\n" ); document.write( "Go here for the steps:\r
\n" ); document.write( "\n" ); document.write( "http://www.purplemath.com/modules/systlin6.htm\r
\n" ); document.write( "\n" ); document.write( "If you do not understand the link above, write back.\r
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