document.write( "Question 1203930: Use substitution to solve the system. \r
\n" ); document.write( "\n" ); document.write( "x-2y=11
\n" ); document.write( "2x+5y=-23\r
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Algebra.Com's Answer #839849 by ikleyn(52814) $\"\"$ $\"About$

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Use substitution to solve the system.
\n" ); document.write( " x - 2y = 11
\n" ); document.write( "2x + 5y = -23
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document.write( "From the first equation, express  x = 2y + 11  and substitute it into the second equatio to get\r\n" );
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document.write( "    2*(2y + 11) + 5y = -23.\r\n" );
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document.write( "Simplify and find y\r\n" );
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document.write( "    4y + 22 + 5y = -23\r\n" );
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document.write( "    9y = -23 - 22\r\n" );
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document.write( "    9y = -45\r\n" );
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document.write( "     y = -45/9 = -5\r\n" );
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document.write( "     x = 2*(-5) + 11 = -10 + 11 = 1.\r\n" );
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document.write( "ANSWER.  x = 1;  y = -5.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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