Răspuns :
a+b+c = 40
a : b = 3 b = a/3
c : a = 2 c = 2a
a + a/3 + 2a = 40 / x 3
3a + a + 6a = 120
10 a = 120
a = 120 : 10
a = 12
b = 12/3 = 4
c = 12 x2 = 24
12+ 4 + 24 = 40
a : b = 3 b = a/3
c : a = 2 c = 2a
a + a/3 + 2a = 40 / x 3
3a + a + 6a = 120
10 a = 120
a = 120 : 10
a = 12
b = 12/3 = 4
c = 12 x2 = 24
12+ 4 + 24 = 40