w + x + y + z = 4 2w + x - 2y - z = 0 w - 2x - y - 2z = -2 3w + 2x + y + 3z = 4
Chapter 3, Problem 43(choose chapter or problem)
w + x + y + z = 4 2w + x - 2y - z = 0 w - 2x - y - 2z = -2 3w + 2x + y + 3z = 4
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