Answer? +b? =c?
a+b+c=30
Answer? +(30-a-c)? =c?
Answer? +900+a? +c? +2ac-60c-60a=c?
arrange
60(a+c)-2a? -2ac=900
60(a+c)-2a(a+c)=900
(60-2a)(a+c)=900
(30-a)(a+c)=450
(30-a)(30-b)=450
Integers with bits A, B and C and (30-a) and (30-b) can be divisible by 450.
30-a & lt; 30,30-b & lt; 30
450=5x5x3x3x2
So 30-a=25, 30-b= 18.
a=5
b= 12
c= 13