document.write( "Question 372773: x=4y+45 Solve the system using the substitution methon
\n" ); document.write( "2y+x=-9
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Algebra.Com's Answer #265521 by rfer(16322)\"\" \"About 
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2y+4y+45=-9
\n" ); document.write( "6y=-54
\n" ); document.write( "y=-9
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\n" ); document.write( "x=4*-9+45
\n" ); document.write( "x=-36+45
\n" ); document.write( "x=9
\n" ); document.write( "------------------
\n" ); document.write( "2*-9+9=-9
\n" ); document.write( "-18=-18
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