prima data : x1/2 = y1/3 = z1/5 = S/10 x1 = S/5 y1 = 3S/10 z1 = S/2
a 2-a oara: x2/(1/2) = y2/(1/3) = z2/(1/5)= S/ (31/30) = 30S/31
x2 = 1/2 ·30S/31 = 15S/31 ; y2 = 1/3 ·30S/31 = 10S/31; z2 = 1/5 ·30S/31 = 6S/31
S/2 + 6S/31 = 3S/10 + 10S/31 + 132
S/5 - 4S/31 = 132
11S = 132·31 S = 12·31 = 372 lei
St = 2·372 = 744 lei