Answers

2015-11-06T20:10:16+05:30
-(-x) = x
x = x           [ since, -(-) = + ]
Therefore, LHS = RHS
Hence, verified

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2015-11-06T21:13:07+05:30
-(-x) =x
it is very simple,
lets take a example⇒ -(-2) will be 2
that's like -(-x) =x subtraction sign will converted into addition sign...
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