Given:
[tex]\begin{gathered} 4x\text{ - 5y - 7z = -1} \\ -7x\text{ + 2y - 8z =1} \\ 20x\text{ - 25y - 35z = -5} \end{gathered}[/tex]
Using a graphing calculator, we have the plot to be:
From the graph, we can see that the values of x and y change dynamically as the value of z changes.
When z = -6
x = 11.889
y = 18.111
