document.write( "Question 741771: For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?\r
\n" ); document.write( "\n" ); document.write( "−x + 2y = 9
\n" ); document.write( "4x + 5y = 9 \n" ); document.write( "

Algebra.Com's Answer #852627 by MathTherapy(10586) $\"\"$ $\"About$

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document.write( "For the following system, if you isolated x in the first equation to use the Substitution Method, what expression\r\n" );
document.write( "would you substitute into the second equation?\r\n" );
document.write( "\r\n" );
document.write( "−x + 2y = 9\r\n" );
document.write( "4x + 5y = 9\r\n" );
document.write( "\r\n" );
document.write( "−  x + 2y = 9\r\n" );
document.write( "\r\n" );
document.write( "+ x - 9 - 9 + x ----- Adding \"x\" to, and subtracting 9 from both sides\r\n" );
document.write( " 2y - 9 = x <=== 1st equation solved for \"x\"

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