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2014-06-06T20:53:05+03:00
3 kg........2,40lei
x kg........12lei

x=3·12/2,40=
                   36/2,40=15 kg
2 5 2
2014-06-06T20:54:13+03:00
3kg..........2,40lei
1kg............x

x=2,40*1/3
x=0,8 lei

3kg..........2,40lei
y..............12lei

y=3*12/2,40
y=3*5
y=15kg
1 5 1