Yes, some expressions can be identical in value.
equals
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The value of a minim rest is identical to that of a minim note.
At -40.
They are identical in value.
identical value
It means they come out to the same number.
The Value of the Determinant becomes 0
Yes.
They are identical or equivalent.
They are callled: Identical equations or Identities See: http://www.tutorvista.com/search/value-algebraic-expressions
true