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Solve the System A) {(4,2,7)}\{ ( 4 , - 2 , - 7 ) \}

question 78

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Solve the system.
- 1x+1y1z=3283x1y+3z=23281x7y+6z=6728\begin{array} { l } \frac { 1 } { x } + \frac { 1 } { y } - \frac { 1 } { z } = - \frac { 3 } { 28 } \\\frac { 3 } { x } - \frac { 1 } { y } + \frac { 3 } { z } = \frac { 23 } { 28 } \\\frac { 1 } { x } - \frac { 7 } { y } + \frac { 6 } { z } = \frac { 67 } { 28 }\end{array}


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