Verify –(–x) = x for:
i)x = −7/9
ii) x = 13/−15
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–(–x) = x
i)x = −7/9
let's take -(-x) as LHS
x as RHS
first we will do LHS
-(-x)= -(-7/9)
which is equal to 7/9
Hence,LHS=RHS
-(-7/9)= 7/9
Therefore it is proof that -(-x)= x
i)x = −13/-15
LHS
-(-x)= -(13/-15) or -(- -13/15)
which is equal to -13/15
Hence, LHS=RHS
-(-7/9)= 7/9
Therefore it is proof that -(-x)= x
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