The solution is where the lines cross. So your x coordinate is 3.Click to let others know, how helpful is it
Answer: C
Step-by-step explanation:

7*(x+5)*(x -5) that is your answer right there
The line
passing through (3, 1, -8) and running parallel to the vector <5, 3, 3> has the vector equation

or

and from this we can extract a set of parametric equations for the line:

where
.