Răspuns :
a/3 = b/7 = c/8 =>
=> a = 3k, b = 7k, c = 8k
Inlocuim
2a + 5b - 4c = 108
6k + 35k - 32k = 108
9k = 108
k = 12
a = 3k = 36
b = 7k = 84
c = 8k = 96
a/3 = b/7 = c/8 =>
=> a = 3k, b = 7k, c = 8k
Inlocuim
2a + 5b - 4c = 108
6k + 35k - 32k = 108
9k = 108
k = 12
a = 3k = 36
b = 7k = 84
c = 8k = 96