Question

1. 9+x-7
2. 8-2x+5x
3. -x-9+3x
4. 4x-6-4x

Answer 1

1)9-7+x

2+x

2)8-2x+5x

8+3x

3)-x+3x-9

2x-9

4)4x-4x-6

-6

you have to group the like terms

I hope this helps and sorry if they are wrong