SOLUTION: {(x - 2y + z = 5),(2x - 5y + 6z = 11),(2x - 3y - 2z = 9):} solve by substitution

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Question 1190124: {(x - 2y + z = 5),(2x - 5y + 6z = 11),(2x - 3y - 2z = 9):}
solve by substitution
Answer by Alan3354(69443) About Me  (Show Source):
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x - 2y + z = 5 ---> 2x - 4y + 2z = 10 ---> 2x = 4y - 2z + 10
2x - 5y + 6z = 11
2x - 3y - 2z = 9
solve by substitution
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2x - 5y + 6z = 11
Sub for 2x
4y - 2z + 10 -5y + 6z = 11
-y + 4z = 1
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2x - 3y - 2z = 9
Sub for 2x
4y - 2z + 10 - 3y - 2z = 9
y - 4z = -1
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Dependent equations, no unique solution