Calculate First time right values for multiple weeks

I found my way now. I just needed to add or substruct days from TODAY this was easy.
The rest was based of the first answer. And at the end a lot of copy and edit.
I don't know if it would be possible with a function:

FTR100 = 
var start_date = TODAY() + 1
VAR temp_done =
    SELECTCOLUMNS (
        Done_tickets,
        "ID", [Issue id],
        "Date", [Updated],
        "Rank",
            COUNTROWS (
                FILTER ( FILTER(Done_tickets, [Updated].[Date] <= start_date), [Updated] >= EARLIER ( Done_tickets[Updated] ) )
            ) + 1
    )
VAR end_date = MINX ( FILTER ( temp_done, [Rank] <= 100 ), [Date] )
VAR temp_reopened =
    SELECTCOLUMNS (
        Reopened_tickets,
        "ID", [Issue id],
        "Date", [Updated],
        "Rank",
            COUNTROWS (
                FILTER ( FILTER(Reopened_tickets, [Updated].[Date] <= start_date), [Updated] >= EARLIER ( Reopened_tickets[Updated] ) )
            ) + 1
    )

var start_date_7 = TODAY() - 6
VAR temp_done_7 =
    SELECTCOLUMNS (
        Done_tickets,
        "ID", [Issue id],
        "Date", [Updated],
        "Rank",
            COUNTROWS (
                FILTER ( FILTER(Done_tickets, [Updated].[Date] <= start_date_7), [Updated] >= EARLIER ( Done_tickets[Updated] ) )
            ) + 1
    )
VAR end_date_7 = MINX ( FILTER ( temp_done_7, [Rank] <= 100 ), [Date] )
VAR temp_reopened_7 =
    SELECTCOLUMNS (
        Reopened_tickets,
        "ID", [Issue id],
        "Date", [Updated],
        "Rank",
            COUNTROWS (
                FILTER ( FILTER(Reopened_tickets, [Updated].[Date] <= start_date_7), [Updated] >= EARLIER ( Reopened_tickets[Updated] ) )
            ) + 1
    )

RETURN
   {
        (start_date, end_date, 100 - COUNTROWS( FILTER(temp_reopened, [Date] >= end_date && [Date] <= start_date))),
        (start_date_7, end_date_7, 100 - COUNTROWS( FILTER(temp_reopened_7, [Date] >= end_date_7 && [Date] <= start_date_7))),
   }