Решение:

with open('9.txt', 'r') as file: 
    f = file.read().splitlines()

c = 0
for i in f:
    line = sorted(map(int, i.split('\t')))
    if line[-1] > sum(line[:-1]) and (line[0] + line[1] == line[2] + line[3]) or (line[0] + line[2] == line[1] + line[3]) or (line[0] + line[3] == line[1] + line[2]):
        c += 1
print(c)

Ответ: 116