2x + y - 2z = -1
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- 2x + y - 2z = -1
3x - 3y - z = 5
x - 2y + 3z = 6
- 3(2x+y)+5z = -1
2(x-3y+4z)=-9
4(1+x)=-3(z-3y)
- 3x - y + 4z =
y + 2z = 1 - x + y - 2z = 2
3x - y - 6z = -7
11 years ago
2x + y - 2z = -1
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