12 would be considered a natural number, whole number, and an integer
Hope this helped
Answer:
-9
Step-by-step explanation:
18÷x = -2
18 = -2×x
18 = -2x
-9 = x
x = -9
Instructions? "Find the number."
12 + 5n = 9n
12 = 4n and so n = 3 (answer)
I believe the answer would be non-proportional