Mathematics

These two lines are reflections of each other across the $y$-axis, with opposite slopes: one climbs left-to-right while the other falls. The key insight is that at their intersection point, both equations must be satisfied simultaneously—so set them equal and solve for $x$, then substitute back to find $y$. This single point is where the two lines cross.

These two lines are reflections of each other across the $y$-axis, with opposite slopes: one climbs left-to-right while the other falls. The key insight is that at their intersection point, both equations must be satisfied simultaneously—so set them equal and solve for $x$, then substitute back to find $y$. This single point is where the two lines cross.