Question

A+B=45 , B+C=61, then A+B+C=?

Answer 1

if a+b=45
and b+c=61
then add a+b and b+c
so 45+61 =106

Answer 2

A = 15 , b = 30 , c = 31 , hence 15+30 = 45 , 30 + 31 = 61 so then 15 + 30 + 31 = 76