1)x=0 sau 5
2)2,25=225/100=45/20=9/4
3)3
4)1000 litri
5)40/100*800=40*8=320
6)a-b=1043
a/b=5 rest 75=>a=5b+75
5b+75-b=4b+75=1043=>4b=1043-75=968
b=968/4=242
a= 5*242+75=1285
7)Volumbazin=800cm*400cm*2cm=640000cm3
640000cm3=64dm3=64 litri=>1 singur transport
nu stiu de ce iti zice 1600 de litri da sper ca te-am ajutat.