document.write( "Question 928506: how to solve x+y=-7 if y=x+1 \n" ); document.write( "
Algebra.Com's Answer #563647 by stanbon(75887)\"\" \"About 
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how to solve x+y=-7 if y=x+1
\n" ); document.write( "Substitute for \"y\" and solve for \"x\"::
\n" ); document.write( "x + (x+1) = -7
\n" ); document.write( "2x = -8
\n" ); document.write( "x = -4
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\n" ); document.write( "Then y = -4+1 = -3
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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