Don't know what your images look like, since tour post was cut off. I'm assuming it's an XY scatter chart. So I made up some data, four sets with X values ranging from 0 to 20, and I've plotted them in four charts.
I've inserted columns in the data so that each series will have its own X values. The beta X values have had 20 added to them, the gamma X values have had 40 added to them, and delta 60 added to them.
The four series together with their original X values are in the first chart, and with their adjusted X values in the second.
Below I show some data I'm going to use so I can add dummy axis labels to the chart. I want my labels to read 5, 10, and 15 (the labels are in the third column), but they have to be at 5, 10, and 15, then at 25, 30, and 35, then 45, 50, and 55, and finally 65, 70, and 75. The X values are in the first column, and the Y values, all zeros, are in the second.
In the first chart, I've locked in the major unit of the X axis to 20, so the major gridlines occur at multiples of 20. I've set the minor unit of the X axis to 5, so minor tickmarks appear at multiples of 5. I've added minor tickmarks outside the axis.
I copied the first two columns of this new data range, selected the chart, and used Paste Special to add the data as a new series, data in columns, X values in first column, series name in first row. These are the round markers along the X axis in the second (top right) chart.
I added data labels to this new series, using the Below position options. I also used the Value from Cells option, using the third column of the new data range. This is shown in the third (bottom left) chart.
Finally, I formatted the added series to use no markers, and I used a custom number format of " " (double quote - space character - double quote) for the X axis tick labels. This is shown in the fourth chart.
....Thanks for your help!
