Use the Gauss-Jordan Method to Solve the System of Equations $4 x-5 y-7 z=-1$

question 214

Multiple Choice

Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last
variable be the arbitrary variable.
- $4 x-5 y-7 z=-1$
$-7 x+2 y-8 z=1$
$20 x-25 y-35 z=-5$

• A) \( \{(-5 z+2,4 z-25, z)\} \)
• B) \( \{(-1,1,-5)\} \)
• C) \( \varnothing \)
• D) \( \{(5,5,-1)\} \)