Solve the System $\left(\begin{array}{rlll}4 x&+&2 y&-&z & = & -4 \\4 x&-&4 y&+&4 z & =&40 \\5 x&+&y&-&5 z & = & -14\end{array}\right)$

question 85

Multiple Choice

Solve the system. $\left(\begin{array}{rlll}4 x&+&2 y&-&z & = & -4 \\4 x&-&4 y&+&4 z & =&40 \\5 x&+&y&-&5 z & = & -14\end{array}\right)$

• A) x = 5, y = -2, z = 2
• B) x = 7, y = -4, z = 2
• C) x = 2, y = -1, z = 6
• D) x = 2, y = -4, z = 4

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