Which statements describe the modern system of classification? Check all that apply.

1: -9 - 4

2: 9 - 4

3: -9 + 4

4: 9+ (-4)

So here is the answer to the given question above. 
If we are to use substitution method in order to solve the following system, the new equation would be 4x – 3(8x + 9) = –22, the answer is the second option. 
Here is how I got the answer.
Let's take 8x - y = -22
So y = 8x + 22
Now, substitute the value of y to 4x – 3y = –22
and we get 4x - 3(8x +9) = -22.
Hope this answer helps.