Automatically calculate (or delete) rows in Excel when first column is changing - excel

Question

I have a big table, where first columns X is "input column" and range it's changing.
Y - There are more formulas and functions (Vlookup) and 1st column X is a lookup value, and then other columns are calculated from other sheets.
| A | B | C | D | E
1 | X | Y | Y | Y | Y
2 | X | Y | Y | Y | Y
3 | X | Y | Y | Y | Y
4 | X | Y | Y | Y | Y
I am inserting (and deleting) more X values (actual data) and then I use "double click" for all other Y columns to be calculated, BUT it's not good because the X range is not the same. I tried to convert it to table "Ctrl-T", but it's not working very good for me. Maybe I don't use it properly.
Problem:
If I paste a new X column, I need other Y columns to be automatically calculated OR if I delete few X rows, other Y should be also deleted. Now I get something like this:
| A | B | C | D | E
1 | X | Y | Y | Y | Y
2 | X | Y | Y | Y | Y
3 | | N/A | N/A | N/A | N/A
4 | | N/A | N/A | N/A | N/A
or:
| A | B | C | D | E
1 | X | Y | Y | Y | Y
2 | X | Y | Y | Y | Y
3 | X | | | |
What I need:
If I remove X value I need automatically disappear Y values:
| A | B | C | D | E
1 | X | Y | Y | Y | Y
2 | X | Y | Y | Y | Y
If I add X value I need automatically calculate Y values:
| A | B | C | D | E
1 | X | Y | Y | Y | Y
2 | X | Y | Y | Y | Y
3 | X | Y | Y | Y | Y
Hope it's clear, thank you!

Answer 1

For Y Columns, you can add "IF" FORMULA
=if(A1>0,*Y COLUMN FORMULA*,"")

Answer 2

try changing formula to
=iferror(*Y formula,"")
or if it's still slow and if you are changing only X Columns
you can use below code
Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Column = 1 And Target.Count = 1 Then 'CHECK IF THERE IS ANY CHANGE ON X COLUMN
If Target.Value = Empty Then 'CHECK IF X COLUMN HAS BEEN DELETED
Rows(Target.Row).Delete 'IF X COLUMN IS DELETED, DELETS WHOLE ROW
Else
Cells(Target.Row - 1, 2).Resize(1, 4).Copy Cells(Target.Row, 2).Resize(1, 4) 'IF X COLUMN IS ENTERED OR MODIFIED COPIES ABOVE Y COLUMN FORMULAS
End If
End If
End Sub