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If x in A " and " A cancelsub B, " then...

If `x in A " and " A cancelsub B, " then " x in B`. Is this statement true ?

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Let A= { 3,5,7 } and B= { 3,4,6 }
Now ,` 5 in A " and " A cancelsub B`
However `5 notin B`
So the given statement is false .
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