Răspuns :
x-nr initial de port.
50%=50/100=1/2
x-1/2-1/3-1/2=70
x-1-1/3=70
x=70+1+1/3
x=214/3
x=71, 6
cantitatea x
cantina 1 x / 2
ramas = x - x / 2 = x / 2
cantina 2 1 / 3 · x / 2 = x / 3·2 = x / 6
rest x / 2 - x / 6 = ( 3x - x) / 6 = 2x / 6 = x / 3
cantina 3 50% · x /3 = 50x / 100·3 = x / 2·3 = x / 6
rest x / 3 - x /6 = ( 2x - x) / 6 = x / 6
x / 6 = 70 kg ; x = 6· 70kg = 420 kg
verificare : cantina 1 420 /2 kg= 210 kg
rest = 420kg - 210 kg = 210 kg
cantina 2 1 /3 · 210 kg = 210 / 3 = 70 kg
rest 210 kg - 70 kg = 140 kg
cantina 3 50% · 140 kg = 50 ·140 /100 kg = 5 ·14 kg = 70 kg
140 kg - 70 kg = 70 kg
cantina 1 x / 2
ramas = x - x / 2 = x / 2
cantina 2 1 / 3 · x / 2 = x / 3·2 = x / 6
rest x / 2 - x / 6 = ( 3x - x) / 6 = 2x / 6 = x / 3
cantina 3 50% · x /3 = 50x / 100·3 = x / 2·3 = x / 6
rest x / 3 - x /6 = ( 2x - x) / 6 = x / 6
x / 6 = 70 kg ; x = 6· 70kg = 420 kg
verificare : cantina 1 420 /2 kg= 210 kg
rest = 420kg - 210 kg = 210 kg
cantina 2 1 /3 · 210 kg = 210 / 3 = 70 kg
rest 210 kg - 70 kg = 140 kg
cantina 3 50% · 140 kg = 50 ·140 /100 kg = 5 ·14 kg = 70 kg
140 kg - 70 kg = 70 kg