Suppose t= {-8,-4,0,4,8,12,16,20} and k= {-3,-2,-1,0,1,2,3,4,5,6}. what is t u k?

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

What is the anwers for 9+2x=5x-3-x

Can someone me with my math problem pls my teacher is on my back about this