document.write( "Question 45913: use substitution method. If the system has an infinite number of solutions, use set builder notation to writh the solution\r
\n" ); document.write( "\n" ); document.write( "x+y=-9
\n" ); document.write( "x-y=14 \n" ); document.write( "

Algebra.Com's Answer #30485 by Nate(3500) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x+%2B+y+=+-9\"$
\n" ); document.write( " $\"y+=+-x+-+9\"$
\n" ); document.write( "plug:
\n" ); document.write( " $\"x+-+y+=+14\"$
\n" ); document.write( " $\"x+-+%28-x+-+9%29+=+14\"$
\n" ); document.write( " $\"x+%2B+x+%2B+9+=+14\"$
\n" ); document.write( " $\"2x+=+5\"$
\n" ); document.write( " $\"x+=+5%2F2\"$
\n" ); document.write( "plug:
\n" ); document.write( " $\"x+%2B+y+=+-9\"$
\n" ); document.write( " $\"5%2F2+%2B+y+=+-18%2F2\"$
\n" ); document.write( " $\"y+=+-23%2F2\"$
\n" ); document.write( "(2.5,-11.5)
\n" ); document.write( " $\"+graph%28600%2C600%2C-10%2C10%2C-12%2C8%2C-x-9%2Cx-14%29+\"$ \n" ); document.write( "

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