A line segment is bisected by a line with the equation # 9 y + x = 5 #. If one end of the line segment is at #( 7 , 4 )#, where is the other end?
The other end is:
Here is a graph:
The family of perpendicular lines is:
Use the point
The equation of the bisected line is:
Multiply equation  by 9 and add to equation :
Use the midpoint equation to find