решите систему уравнения
3x-y=3
3x-2y=0
2)
y+y=7
5x-7y=11
3)5x+y=14
3x-2y=-2
4)2x+y=-5
x-3y=-6
5)
2x+3y=3
5x+6=9
6)
3x+2y=8
2x+5y=10
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