Question 949339
The set of points (x,y) such that the distance from (x,y) to (7,0) is equal to the distance from (x,y) to (-7,y).  Use the Distance Formula to represent the description and simplify that equation.


The starting equation is
{{{sqrt((x-7)^2+(y-0)^2)=sqrt((x-(-7))^2+(y-y)^2)}}}