Delete Records From A Table Using Records In Another Table.

I have been searching many postings and I cant seem to find anyone
that has this answer so I decided to post. I am using SQL
(Transact-SQL).If I have 2 tables with columns
acct_num,activity_date,and pay_amt and I want to delete one instance
of a record in table 1 for every instance of that record in table 2
how could I do that. For example.

Table 1
-----------
acct activity_date pay_amt
123 5/1/2004 50.00
123 5/1/2004 50.00
123 5/1/2004 50.00
123 5/1/2004 50.00
123 5/1/2004 50.00

Table 2
-----------
acct activity_date pay_amt
123 5/1/2004 50.00
123 5/1/2004 50.00

I need a delete statement that will find 2 of the 5 records(It doesn't
matter which 2) and delete them.
Leaving table one looking like this.
Table 1
-----------
acct activity_date pay_amt
123 5/1/2004 50.00
123 5/1/2004 50.00
123 5/1/2004 50.00

How can I do this??