document.write( "Question 1204028: The cardinal number of ​{​xlx=x+5 and x∈N} is \n" ); document.write( "
Algebra.Com's Answer #840021 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( ". . . is 0 (zero).\r
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\n" ); document.write( "\n" ); document.write( "This set of x's is empty.\r
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