Ex.9 te rog repedeeeee

a = 30
b = 60
c = 10
a + b + c = 100
a = b/2
c = a/2 - 5 => c = b/4 - 5
b/2 + b + b/4 - 5 = 100
(2b + 4b + b - 20)/4 = 100
7b - 20 = 400
7b = 420
b = 60
a = 60/2 = 30
c = 60/4 - 5 = 15 - 5 = 10