Answer:
Unsure of what this question was asking so I gave 2 answers.
Equation: x + y × z = -40
Possible 2 numbers: -8 and -8, -7 and -9, -6 and -10, and so on
Number that was multiplied: -16 and multiplied by 2.5 to get -40
Final equation using this information: -8 + -8 × 2.5 = -40
Hope this helps!