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answerhappygod
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7 - (a) { x - 2y +32 2x + y + z -3x + 2y - 22 4 -10
- 3х - 2y + 2z 7 - 3y + 2z 2х - Зу +4z 6 -1 о (b) - E -
-3 - (c) x + 2y - z 2x - 4y + z -230 + 2y - 32 - 7 - =
- = - 8 12 1 x + 4y - 32 3x - y + 32 3 +y + 6z - (d) =
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