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Ответ дан
sergeevaolga5

2x-y=3

2*1-(-1)=2+1=3       2*2-1=4-1=3

x=1, y=-1                x=2, y=1

(x-1/3)(y+2)=0

x-1/3=0 или y+2=0

x=1/3            y=-2

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