document.write( "Question 888777: solve using substitution method
\n" ); document.write( "6x+7y=-27
\n" ); document.write( "x=13-7y
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Algebra.Com's Answer #537673 by Alan3354(69443)\"\" \"About 
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6x+7y=-27
\n" ); document.write( "x=13-7y
\n" ); document.write( "----------
\n" ); document.write( "Sub for x in the 1st eqn\r
\n" ); document.write( "\n" ); document.write( "x=13-7y
\n" ); document.write( "
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