Question

verify that -(-a)=a is true for a = -19/21
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Answer 1

Step-by-step explanation:

-(-a) = a

a= (-19)/21

Additive inverse of {a = (-19)/21} is {(-a) = 19/21}

Additive inverse of {(-a) = 19/21} is {-(-a) = (-19)/21}

a = -(-a)

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

I hope you understand!!!!