Answer:
-3 and 2
Explanation:
let the first number be x and the second be y
four times a number minus twice another number is -16
4x-2y= -16------i
the sum of the two numbers is -1
x+y= -1
x=-1-y------ii
substitute ii in i
4(-1-y)-2y=-16
-4-4y-2y=-16
-4-6y=-16
collectinglike terms
-6y=-16+4
-6y=-12
y=2
substitutes for y in ii
x=-1-y
-1-2
x=-3