a)
x + y + z = 200
x/2 = y/3 = z/5
y = 3/2 x
z = 5/2 x
x + 3/2 x + 5/2 x = 200
(2 + 3 + 5)/2 x = 200
10 x = 400
x = 40
y = 3/2 * 40 = 60 (* este inmultit)
z = 5/2 * 40 = 100
p = x/2 = 40/2 = 20
x = 40 = 2 * 20 = 2p
y = 60 = 3 * 20 = 3p
z = 100 = 5 * 20 = 5p
b) x = 40 lei
y = 60 lei
z = 100 lei