document.write( "Question 1204012: Solve this system using the elimination method. \r
\n" ); document.write( "\n" ); document.write( "-2x - y = -7 \r
\n" ); document.write( "\n" ); document.write( "and\r
\n" ); document.write( "\n" ); document.write( "x + 7y = 10 \n" ); document.write( "

Algebra.Com's Answer #839995 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( " $\"-2x+-+y+=+-7\"$ ....eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+7y+=+10\"$ .....eq.2....both sides multiply by $\"2\"$
\n" ); document.write( "________________________________\r
\n" ); document.write( "\n" ); document.write( " $\"-2x+-+y+=+-7\"$ ....eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+14y+=+20\"$ .....eq.2
\n" ); document.write( "_____________________________________add both eq.\r
\n" ); document.write( "\n" ); document.write( " $\"-2x+-+y+%2B2x+%2B+14y+=+-7%2B20\"$ ....eq.1 \r
\n" ); document.write( "\n" ); document.write( " $\"13y+=+13\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+1\"$ \r
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\n" ); document.write( "\n" ); document.write( "go to\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+14y+=+20\"$ .....eq.2, substitute $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+14%2A1+=+20\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+14+=+20\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x+=+20-14\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2x+=+6\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+3\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"+graph%28600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+-2x+%2B7%2C++10%2F7+-+x%2F7%29+\"$ \r
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