Odpowiedzi

2010-04-11T17:09:18+02:00
Z- ziemniaki
b- buraki
k - kapusta

z+b+k=1800
z=5b
k= b+120, więc:
5b + b + b +120=1800
7b= 1680 |/7
b=240 kg
z=5b=5*240=1200
k=b+120=240+120=360

Spr.
1200+360+240=1800

pozdrawiam
2010-04-11T17:14:00+02:00
Buraki - b
ziemniaki - 5b
kapusta - b + 120 kg

1800 = b+5b+b-120
1800 = 7b + 120 //-120
1680= 7b // :7
b=240

buraki - 240 kg
ziemniaki - 1200 (240*5)
kapusta - 360 (240 +120)