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a+(a+1)+(a+2)=540
3a+3=540
3a=537
a=179
a+1=180
a+2=181
2)
1 rogal = x
1 bochenek 5x
4x+5x*2=6,30
14x=6,30
x=0,45-rogal
5x=2,25-bochenek