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Solve the System of Equations {2xy+5z=7x+y2z=2xy+4z=8\left\{ \begin{aligned}2 x - y + 5 z & = - 7 \\x + y - 2 z & = - 2 \\x - y + 4 z & = 8\end{aligned} \right.

Question 198

Multiple Choice

Solve the system of equations.
- {2xy+5z=7x+y2z=2xy+4z=8\left\{ \begin{aligned}2 x - y + 5 z & = - 7 \\x + y - 2 z & = - 2 \\x - y + 4 z & = 8\end{aligned} \right.


A) x=3zx = - 3 - z
y=z3y = z - 3
y=3z+1y = 3 z + 1
z=z = any real number

B) x=3z+1x = 3 z + 1
y=z3y = z - 3
z=z = any real number


C) x=z+3x = z + 3
y=3z+1y = 3 z + 1
z=z = any real number

D) inconsistent (no solution)

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