Question 1190124
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