document.write( "Question 221041: What property goes for this equation?: x(y+1)+[1+(-1)]= x(y+1) \n" ); document.write( "
Algebra.Com's Answer #165857 by rapaljer(4671)\"\" \"About 
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By the additive inverse property [1+(-1)] equals zero.
\n" ); document.write( "Then by the identity property of addition, x(y+1)+0=x(y+1).
\n" ); document.write( "So, actually TWO properties are involved.\r
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\n" ); document.write( "\n" ); document.write( "R^2
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