Odpowiedzi

2010-03-30T19:30:09+02:00
Ziemniaki- 5x
buraki- x
kapusta- x+120 kg
razem- 1800 kg

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

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

Odp.: Zebrano 1200 kg ziemnieków, 240 kg buraków i 360 kg kapusty.
2010-03-30T19:35:58+02:00
X- waga buraków
5x- waga ziemniaków
x+120- waga kapusty

x+ 5x + x+120 = 1800
7x + 120 = 1800
7x = 1680
x= 240 [kg]- waga buraków
5x = 5 * 240 = 1200 [kg]- waga ziemniaków
x + 120 = 240 + 120 = 360 [kg]- waga kapusty