Find the equation of a line through the point (5,-2) and perpendicular to the line 2x + 5y = 7

In the video at the end I changed all of my signs by multiplying both sides of the equation by -1. The signs can’t just magically change.

Find the equation of a line through the point (5,-2) and perpendicular to the line 2x + 5y = 7

In the video at the end I changed all of my signs by multiplying both sides of the equation by -1. The signs can’t just magically change.