Question

verify-(-a)=a for each of the following
a=-21/-19

Answer 1

-(+21/-19)=-21/-19

here is your answer mate....!!

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Answer 2

${\fbox{\boxed {\huge{\rm{\red{Answer!!}}}}}}$

${\bold{\rm{ - ( - a) = a}}}$

${\rm{putting \: the \: value \: of \: a \: in \: it}}$

${\rm{\implies{ - ( - ( - \frac{19}{21} )) = [ - \frac{19}{21} ] = -\frac {19}{21} }}}$

${\rm{so \: it \: give \: the \: value \: of \: a}}$

${ \boxed{\rm{(i.e) \frac{ - 19}{21}}}}$

${\huge{\green{\rm{bebrainly}}}}$