Răspuns:
Explicație pas cu pas:
a- 1 vagon grau
b=a-600 vagon cu secara
c=a+200 vagon cu orz
5a+3b+4c=23t
5a+3(a-600)+4(a+200)=23000kg
5a+3a-1800+4a+800=23000
12a=23000+1800-800
12a=24000
a=2000
2000x5=10 000 kg grau
b=2000-600=1400
1400x3=4200kg secara
c=2000+200=2200
2200x4=8800 kg orz