Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the first leg score of the matchup with a 2nd leg of 80-70?

### Inputs:
table_name: table, columns: ['Team #1', 'Agg.', 'Team #2', '1st leg', '2nd leg']

### Response:
SELECT 1st leg FROM table WHERE 2nd leg = 80-70