Verify a-(-b)=a+b for the following values of a and b
1. a=21
2. b=18
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Answer:
1. ) a = 21
a - (- b) = a + b
a + b = a + b
21 + b = 21 + b
b = 0
2. ) b = 18
a - (-18) = a + 18
a - 18 = a + 18
a = a + 36
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