The product of two integers is -120. If one number is 15, find the other.

Let the two integers be p and q.

Given that p x q = -120 and p = 15

Substitute p in the below equation:

p x q = -120

15 x q = −120 $\hspace{1cm}$(Substitute p)

q = $\dfrac{-120}{15}$ $\hspace{1.4cm}$(Solve for q)

q = -8

∴ The other number is -8.