AB lies on a number line. The coordinate of point A is -6. Given that AB= 20, what are the two possible coordinates for point B?
The fact that you must remember is that these points lie on a plane that have a a distance that is ALWAYS an absolute value. If point A lies on -6 you can have two points that are of a distance 20 points in either direction. If moving the left, point B can have a value of -26 and moving to the right, point B will have a value of 14. Hope this is clear!