Question

a-(-b)=a+b a=18 b=21​

Answer 1

Answer:

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Step-by-step explanation:

vdjdkrbdbdbjdkdndbe

Answer 2

Answer:

18+21=29 it is a simple question do now that

here is the explanation

Step-by-step explanation:

a=18

b=21

since,

a-(-b) =a+b

= 18+21

=39