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y - cena chleba
5x + 3y = 9,45
0,45y = x
5*0,45y + 3y = 9,45
5,25y = 9,45
y = 1,8
x = 0,45*1,8 = 0,81
x = 0,81
y = 1,8
1,35x=9,45-5,00
1,35x=4,45|:1,35
x=3,29
x-cena chleba
5*0,45x+3x=9,45
2,25x+3x=9,45
5,25x=9,45
x=1,8
1,8*0,45=0,81zl
odp.chleb kosztował 1,8 a bułka 0,81zl