Question

J is the midpoint of KL. The coordinates of J are (-8,7) and the coordinates of K are (3,4) find the coordinates of L?
*Picture inside to show*

Answer 1

I got this far and lost it.

Answer 2

J=(K+L)/2
2J=K+L
L=2J-K=2(-8,7)-(3,4)

Answer 3

See, that makes no sense to me. Can you dumb it down for me?

Answer 4

the midpoint of two points (a,b) and (c,d) is at ((a+c)/2,(b+d)/2)
let point L be at (x,y)
the midpoint of K and L is at ((3+x)/2,(4+y)/2)
which must be equal to J

Answer 5

Ohhh, Thanks a bunch.

Answer 6

:)