By definition, an expression does not contain AN EQUALS SIGN (=).
Answer:
when
.
Step-by-step explanation:
Given: 
To find: Value of
, substituting the known value of 
We have,

Putting
in equation
, we get


Hence, the value of
is
, when the value of
is
.
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</span><span>http://www.squiglysplayhouse.com/BrainTeasers/bt.php?id=119
this should help</span>