document.write( "Question 1033954: X+y=1
\n" ); document.write( "X-2y=4 \n" ); document.write( "

Algebra.Com's Answer #648549 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
(1) $\"+x+%2B+y+=+1+\"$
\n" ); document.write( "(2) $\"+x+-+2y+=+4+\"$
\n" ); document.write( "------------------
\n" ); document.write( "Multiply both sides of (1) by $\"+2+\"$
\n" ); document.write( "and add the equations
\n" ); document.write( "(1) $\"+2x+%2B+2y+=+2+\"$
\n" ); document.write( "(2) $\"+x+-+2y+=+4+\"$
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+3x+=+6+\"$
\n" ); document.write( " $\"+x+=+2+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+x+%2B+y+=+1+\"$
\n" ); document.write( "(1) $\"+2+%2B+y+=+1+\"$
\n" ); document.write( "(1) $\"+y+=+-1+\"$
\n" ); document.write( "-------------------
\n" ); document.write( "The solution is:
\n" ); document.write( "( 2, -1 )
\n" ); document.write( "----------------
\n" ); document.write( "Here's the plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-6%2C+6%2C+-6%2C+6%2C+-x+%2B+1%2C+%281%2F2%29%2Ax+-+2+%29+\"$ \n" ); document.write( "

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