math
posted by HELP HELP HELP MNHS on .
(In this question the answer is 4, please explain how did they get it)
If A and B have coordinates 15 and 11, what is the coordinate of X if X is 4 units farther from B as from A?

Always make a sketch
Place X between A and B , a bit closer to A
XB  XA = 4
11x  (x(15)) = 4
11x  x  15 = 4
2x = 8
x = 4
check by counting the result on the number line