document.write( "Question 875293: given the equations 2x+y=1 and y=x+7 find the value of x-y \n" ); document.write( "
Algebra.Com's Answer #528093 by ewatrrr(24785)\"\" \"About 
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2x + y = 1
\n" ); document.write( " x - y = -7
\n" ); document.write( " 2x = -6
\n" ); document.write( " x = -3 and y = 4 \"-3+-+y+=+-7\"
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