Answer: Solving systems involving more than three variables can be accomplished with
Chapter 4, Problem 4.2.44(choose chapter or problem)
Solving systems involving more than three variables can be accomplished with methods similar to those encountered in this section. Apply what you already know to solve each system of equations in four variables.2x - z = -1y + z + w = 9y - 2w = -6x + y = 3
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