document.write( "Question 581609: Solve the system using substitution
\n" ); document.write( "3x+2y=9
\n" ); document.write( "x=4-y
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Algebra.Com's Answer #371720 by jim_thompson5910(35256)\"\" \"About 
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3x+2y=9\r
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\n" ); document.write( "\n" ); document.write( "3(4-y)+2y=9\r
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\n" ); document.write( "\n" ); document.write( "12-3y+2y=9\r
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\n" ); document.write( "\n" ); document.write( "-y+12=9\r
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\n" ); document.write( "\n" ); document.write( "-y=9-12\r
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\n" ); document.write( "\n" ); document.write( "-y=-3\r
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\n" ); document.write( "\n" ); document.write( "y=(-3)/(-1)\r
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\n" ); document.write( "\n" ); document.write( "y=3\r
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\n" ); document.write( "\n" ); document.write( "x = 4-y\r
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\n" ); document.write( "\n" ); document.write( "x = 4-3\r
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\n" ); document.write( "\n" ); document.write( "x = 1\r
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\n" ); document.write( "\n" ); document.write( "So the solutions are x = 1 and y = 3\r
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\n" ); document.write( "\n" ); document.write( "This means that the system is consistent and independent.
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