What two numbers multiply to -20 but add to 19?

Answer 1

-1

Answer 2

20 and -1 are the two numbers.

Explanation:

20 + -1 = 19

if someone has $20 and owes (minus) $1

then they have $19

20 x -1 = -20

if 20 people each owe (minus) $1

then together they owe $20