Question

verify that -(-a)=a is true for a =-19\21​

Answer 1

Answer:

-(-a) = a

Putting The Value of a in it

-(-(-19/21 ) ) = -[ 19/21 ] = -19/21

So, It Give The Value Of a

i.e., = -19/21

Step-by-step explanation:pls mark on brainlist

Answer 2

Answer:

refer to the image for solution hope it will help you