First, you should combine the x terms:
-3x - 7 = 29
Then, get rid of the negative 7, by adding 7 to both sides.
-3x = 22
Finally divide 22 by -3, to solve for x.
x = -22/3 or -7.33
Hey I’m sorry but I do not know the answer.
The 3rd one. It is the line that shows the average of most of the points since it’s more in the middle.