Calculate the difference:
(-3x + 8) - (-3x + 9)
Multiply each term in -3x + 9 by -1
-1 x (-3x + 9) = 3x - 9
Collect all of our terms:
-3x + 8 + 3x - 9
Now group all of our x terms:
-3x + 3x = 0x
Now group all of our constant terms:
8 - 9 = -1
Build our answer:
- 1