document.write( "Question 229228: if x+y=1, and x-y=1, then y = ? \n" ); document.write( "

Algebra.Com's Answer #169978 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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Obviously y has to = 0, however prove it with elimination
\n" ); document.write( ":
\n" ); document.write( "x + y = 1
\n" ); document.write( "x - y = 1,
\n" ); document.write( "-------------Subtraction eliminates x and gives us y
\n" ); document.write( "0 + 2y = 0
\n" ); document.write( "y = 0 \n" ); document.write( "

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