(2, -5) is the mid point
(3, 6) is (2+1, -5+11) is an end point
therefor the other end point should be (2-1, -5-11) = (1, -16)
You could visualise this better if you draw it
Hope this helps, I don't really know a better way to explain it, sorry =P
10. 8 divided by 4 is 2 times 2 is 4 8 plus 6 minus 4 is 10
Answer:
4x+3
How: -2x - (-6x) = 4
3 cannot be added there you go