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Solve the system of linear equations. If the system has an infinite number of solutions, set...

Solve the system of linear equations. If the system has an infinite number of solutions, set w = t and solve for x, y, and z in terms of t.)

x + y + z + w = 6

2x+3y -      w=6

-3x +4y +z + 2w= -1

x + 2y - z + w = 0

x, y, z, w=?

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