The first of these equations plus the second equals the third: x + y + z = 2 x + 2y + z
Chapter 1, Problem 1.2.17(choose chapter or problem)
The first of these equations plus the second equals the third: x + y + z = 2 x + 2y + z = 3 2x + 3y + 2z = 5. The first two planes meet along a line. The third plane contains that line, because if x, y, z satisfy the first two equations then they also . The equations have infinitely many solutions (the whole line L). Find three solutions.
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