Question

How would is solve these systems?4x - 5y - 7z = -1-7x + 2y - 8z = 120x - 25y - 35z = -5

Answer 1

Given:

`\begin{gathered} 4x\text{ - 5y - 7z = -1} \\ -7x\text{ + 2y - 8z =1} \\ 20x\text{ - 25y - 35z = -5} \end{gathered}`

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