Math problem in spreadsheet

I have a math problem I am trying to solve in excel. I am trying to lay out a grid of cells in another program and I don't have the math skills to solve it. The cell needs to know its column number and I am trying to achieve this by using is X axis position.

In the attached spreadsheet;
Row 1 is the column number and the result I am looking for
Row 2 is the cell/column width
Row 3 is the X axis position for the cells in that column. The first column starts 10 pixels in from the edge so it's Pos X = 10 + column width / 2
Row 4 is my attempt to mathematically find the column number by its X position. A poor effort but about my level of math
Row 5 is where the result needs to replicate row 1

Then cell size (Row 2) and position on the X axis (Row 3) are known and I need the cells to calculate which column they are in.

Any help would be greatly appreciated.

Hi adyteo I am trying to find each cells column number by using its position or size or both of these. The attached spreadsheet is my workings and attempt to solve it.

Each cell only has access to it's own width, position, total of all widths and total of all positions. I was trying to figure out a calculation using positions but as you have noticed the distance between positions vary due to the different widths. I don't know if it is even possible to mathematically solve this. I was hoping someone could either solve it or tell me it isn't possible.

Doesn't look like it is possible thanks for your help adyteo.