Exercise 36 Page 248

If we consider the equations as a system of equations, it would be true that the solution to the system is $(4,0).$ This is because the solution to a system is $(x,y)$ that solves both equations. Notice that when we set the equations equal to each other there is only one variable left, $x.$ This implies that the $y\text{-}$values are equal and the solution to the equation will be the $x\text{-}$coordinate of the point where the lines intersect. Let's solve this equation. The solution is $x=4$ and $(4,0)$ is the intersection point. Therefore, our friend is incorrect.