(-3,7)(9,5)
midpoint formula : (x1 + x2)/2 , (y1 + y1)/2
(-3 + 9)/2 , (7 + 5)/2 = (6/2, 12/2) = (3,6) <==
Answer:
x = 11
Step-by-step explanation:
First, you have to add four to both sides to get
5x = 5x + 11
Now, you have to subtract 5x on both sides to get
x = 11
:) Good luck!