Solve the System of Equations Using the Addition Method $$\begin{array} { l } x + y + z = - 7 \\x - y + 5 z = - 21 \\4 x + y + z = - 22\end{array}$$

question 68

Multiple Choice

Solve the system of equations using the addition method.
- $$\begin{array} { l } x + y + z = - 7 \\x - y + 5 z = - 21 \\4 x + y + z = - 22\end{array}$$

• A)(-3, -5, 1)
• B)(1, -5, -3)
• C)(-3, 1, -5)
• D)(-5, 1, -3)

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