1 Answer

I assume that you want to find the value of z in this equation. (Always write the question completely. That means "exactly what you want to do").

- 3z + 2.8 = 8.8

-3z = 8.8 - 2.8 = 6

z = 6 divided by -3 = +6 divided by -3 = -2 

If there is no sign before a number, we assume that it is plus.

To divide in Algebra, divide the signs first and then divide the numbers.

Use the following rules to divide the signs:

+ divided by + equals +

- divided by - equals +

+ divided by - equals -

- divided by + equals - 

The same rules apply for multiplication:

+ multiplied by + equals +

- multiplied by - equals +

+ multiplied by - equals -

- multiplied by + equals -

If you have any questions or doubts, please let me know.