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OpenStudy (superhelp101):
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. 2x - 3y - z = -1 x - 4y + 3z = -11 2x + 9y + 3z = -13 -11y + 5z = 21 y + 9z = 9 5y - 7z = 21 17y - 3z = 9 7x - 13y = -14 8x + 0y = -16 -5x +5y = -8 -4x + 18z = -10
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