{ a, b, c } i.p { 2, 3, 4 }
a x 2 = b x 3 = c x 4 = k
a x 2 = k ⇒ a = k/2
b x 3 = k ⇒ b = k/3
c x 4 = k ⇒ c = k/2
a + b + c = 130
k/2 + k/3 + k/4 = 130 ( numitorul comun e 12 )
6k/12 + 4k/12 + 3k/12 = 130
13k/12 = 130
13k = 130 x 12
13k = 1560
k = 120
a = 120/2 = 60
b = 120/3 = 40
c = 120/4 = 30
