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Mathematics 9 Online
OpenStudy (anonymous):

My answer is B If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation. 3x - 5y + z = 12 x + 6y - z = -4 2x - 5y - 2z = -8 (4 points) Answer 4x + y = 8 -17y = 0 2x - 11y = 16 4x + 7y = -16 -23y + 4z = 24 -17y = 0 13y - 2z = 24 7y - 4z = 0

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