If the distance between the two points A and B is 7 grids along the horizontal direction in the following diagram, find the value of x.
We observe that points A and B have the same y-coordinate 3.
The distance between them is 7 grids along the horizontal direction.
So, to find the value of x, we add
7 to 2.
∴ x = 2 + 7 = 9
Hence, the value of x is 9.
So, the two points are A(2,3) and B(9,3).