a + b+c= 180 966
a + b = 102 312
b + c = 135 093
102 312 + c = 180 966
c = 180 966 - 102 312
c = 78 654
b + c = 135 093
b + 78 654 = 135 093
b = 135 093 - 78 654
b = 56439
a + b = 102 312
a + 56439 = 102312
a = 102 312 - 56 439
a = 45 873
45 873 + 56 439 + 78 654 = 180 966