Question

Solve for x: -9x + 1 = -80

Answer 1

-9x = -80 - 1 = -81
x = -81 / -9 = 9

Answer 2

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