document.write( "Question 103245: Solve using the Subsititution method:
\n" ); document.write( "x-y=4
\n" ); document.write( "y=2-x \n" ); document.write( "

Algebra.Com's Answer #75080 by MathLover1(20855) $\"\"$ $\"About$

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\n" ); document.write( " $\"x-y=4\"$ from equation $\"x+=+y+%2B+4\"$ substitute this value of $\"x\"$ in second equation
\n" ); document.write( " $\"y=2-x+\"$ = > $\"y+=+2+%96+%28y+%2B+4%29\"$
\n" ); document.write( " $\"+y+=+2+%96+y+%96+4\"$
\n" ); document.write( " $\"y+%2B+y+=+-4\"$
\n" ); document.write( " $\"2y+=+-4\"$
\n" ); document.write( " $\"y+=+-2\"$ \r
\n" ); document.write( "\n" ); document.write( "now substitute $\"y+=+-2\"$ in $\"x-y=4\"$ and find $\"x\"$
\n" ); document.write( " $\"x-y=4+\"$
\n" ); document.write( " $\"x-%28-2%29=4+\"$
\n" ); document.write( " $\"x+%2B+2+=+4\"$
\n" ); document.write( " $\"x+=+4+%96+2\"$
\n" ); document.write( " $\"x+=+2++\"$
\n" ); document.write( " \n" ); document.write( "

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