Consider the given two equations
The graph of system of lines is as shown below
From the graph the given two lines are intersect at single point
The given equations
Since the coefficients of the terms are negative of each other, we can add the equations to eliminate. The new equations are
Now we back- substitute into the original equations and solve for.
Let’s choose the first equation because it looks simpler.
The solution is, the graph of the equations in the system intersect at the point.