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(1 point) Solve the system +2x3 -2x3 +14x3 +2x3 X1 2x1 X1 = x = x3 = X4 = x2 -3x2 -X2 +3x4 -3x4

(1 point) Solve the system +2x3 -2x3 +14x3 +2x3 X1 2x1 X1 = x = x3 = X4 = x2 -3x2 -X2 +3x4 -3x4 +15x4 +8x4 = -10 11 -81 -11

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