Question

-4a+8+3a-9

Answer 1

Collect like terms :
- 4 a + 3a = -1a
+ 8 - 9 = -1
-1a -1

Answer 2

-4a + 8 + 3a - 9 = 0
-4a + 3a + 8 - 9 = 0
-a - 1 = 0
-a = 1
a = -1

If this helps, please choose good answer.
Visit my website at: http://www.tutorsean.net for free math videos.

Answer 3

thanks so much!!!

Answer 4

-4a+8+3a-9
-a -1
-(a+1)

Answer 5

thanks