Solve the System A) $\{ ( 4,5 , - 2 ) \}$

question 101

Multiple Choice

Solve the system.
- $$\begin{array} { l } \frac { 1 } { x } + \frac { 1 } { y } + \frac { 1 } { z } = \frac { 19 } { 20 } \\\frac { 1 } { x } - \frac { 1 } { y } - \frac { 7 } { z } = - \frac { 69 } { 20 } \\\frac { 9 } { x } + \frac { 1 } { y } + \frac { 1 } { z } = \frac { 59 } { 20 }\end{array}$$

• A) \(\{ ( 4,5 , - 2 ) \}\)
• B) \(\{ ( 4,5,2 ) \}\)
• C) \(\left\{ \left( \frac { 1 } { 4 } , \frac { 1 } { 5 } , \frac { 1 } { 2 } \right) \right\}\)
• D) \(\{ ( - 4 , - 5,2 ) \}\)

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