document.write( "Question 119769: solve by substitution\r
\n" ); document.write( "\n" ); document.write( "x-y=-3
\n" ); document.write( "x-y=4
\n" ); document.write( "

Algebra.Com's Answer #87757 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
x-y=-3 & x-y=4 do not have unique solutions:
\n" ); document.write( "x=y-3
\n" ); document.write( "(y-3)-y=4
\n" ); document.write( "y-3-y=4
\n" ); document.write( "-3=4 not a solution.
\n" ); document.write( "even if you attempt to graph these 2 equations there is no solution:
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+x+%2B3+%2C+y+=+x+-4%29+\" (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x +3 and y = x -4).
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