Question

a+b+c=66 a+b=33 b+c=55 a,b,c=?

Answer 1

   
a + b + c = 66
a + b       = 33
      b + c = 55

a = a + b + c - (b + c) = 66 = 55 = 11

c = a + b + c - (a + b) = 66 = 33 = 33

b = a + b + c - a - c = 66 - 11 - 33 = 22

Solutia:
a = 11
b = 22
c = 33