Answer:
-9 = n
Step-by-step explanation:
-9 + 9n = 10n
In order to solve the problem get n on one side and to do that:
Subtract 9n on both sides because 9n is smaller than 10n and is on the same side as an integer
-9 = 1n or -9 = n
That's it!
Vote Brainliest, Thx :)
