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8) Suppose the solution set of a certain system of linear equation as x = 3x4 + 5, x = -2-7x3. x3 and x4

8) Suppose the solution set of a certain system of linear equation as x = 3x4 + 5, x = -2-7x3. x3 and x4 are free. Use vector to describe the solution vectors on a plane in space.

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