document.write( "Question 409468: Prove ((B union{x})-{x}) is a subset of B. \n" ); document.write( "

Algebra.Com's Answer #288256 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "If

then

and then

contains all the elements of

except

. Then

is a proper subset of B, and is therefore a subset of B by definition of subset.\r
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\n" ); document.write( "\n" ); document.write( "If

then

. But any set is a subset of itself by definition of subset, therefore

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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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$\"The$

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