Answer:
Step-by-step explanation:
-9x + 1 = - 80
Take 1 to another side and when it goes to another side it changes its sign and become -
- 9x = - 80 -1
- 9x = - 81
As we can see both sides have minus so it will be cancelled
9x = 81
x = 81/9
therefore x = 9
