Use a Graphing Calculator to Express Solutions with Approximations to the Nearest

Multiple Choice

Use a graphing calculator to Express solutions with approximations to the nearest thousandth.
- $$\begin{array} { l } x - y + 4 z = 7 \\3 x + z = 3 \\x + 5 y + z = 28\end{array}$$

A) $\{ ( 3,5,0 ) \}$
B) $\varnothing$
C) $\{ ( 3,0,5 ) \}$
D) $\{ ( 0,5,3 ) \}$