Системы способом подстановки
|x-y=2
|2x-3y=-1
|8x-3y=7
|3x+y=9
|3(x+2y)-y=27
|4(x+y)-3x=23
|5x-2(y+4)=0
|6(2x+3)-y=41
|x-y=2
|2x-3y=-1
|8x-3y=7
|3x+y=9
|3(x+2y)-y=27
|4(x+y)-3x=23
|5x-2(y+4)=0
|6(2x+3)-y=41
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