Solve the System A) $\left\{ \left\{ - \frac { 1 } { 2 } , 1 , - \frac { 1 } { 7 } \right) \right\}$

question 503

Multiple Choice

Solve the system.
$\begin{array} { l } \frac { 1 } { x } + \frac { 1 } { y } - \frac { 1 } { z } = \frac { 9 } { 14 } \\\frac { 4 } { x } - \frac { 1 } { y } + \frac { 9 } { z } = - \frac { 30 } { 7 } \\- \frac { 1 } { x } + \frac { 8 } { y } - \frac { 6 } { z } = \frac { 131 } { 14 }\end{array}$

• A) \(\left\{ \left\{ - \frac { 1 } { 2 } , 1 , - \frac { 1 } { 7 } \right) \right\}\)
• B) \(\{ ( - 2,1,7 ) \}\)
• C) \(\left\{ \left( - \frac { 1 } { 2 } , 1 , \frac { 1 } { 7 } \right\} \right\}\)
• D) \(\{ ( - 2,1 , - 7 ) \}\)

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