Question

verify a-(-b) = a+b for the following values 1) a=21 b=18 2) a=28 b=11​

Answer 1

$1) \: \: \: put \: a = 21 \: \: \: b = 18$

$21 - ( - 18) = 21 + 18$

$21 + 18 = 39$

$39 = 39$

$hence \: verified$

$2) \: \: \: put \: a = 28 \: \: \: b = 11$

$28 - ( - 11) = 28 + 11$

$28 + 11 = 28 + 11$

$39 = 39$

$hence \: verified$