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Y – motocykle
X+Y=66
5X+2Y=219
X=66-Y
5(66-Y)+2Y=219
X=66-Y
330-5Y+2Y=219
X=66-Y
330-3Y=219
X=66-Y
330-219=3Y
X=66-Y
111=3Y /:3
X=66-Y
37=Y
X=66-37
X=29
X=29
Y=37