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2x-3y-3z=-14 6x+2y-2z=-2 4x+2y-4z=-2
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2x-3y-3z=-14 6x+2y-2z=-2
4x+2y-4z=-2

User Novellizator
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1 Answer

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+2x- 2y + 3z =-4
2(-3) - 2(-7) + 3(-4) = -4
-6 + 14 - 12 = -4
-18 + 14 = -4

User Agomcas
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