6. 8x - 6 + x - 1
8x + x - 6 - 1
9x - 7
7. -2x + 14 - 9x + (-1)
-2x + 14 - 9x - 1
-2x - 9x + 14 - 1
-11x + 13
8. 7 + 10x - x + (-x)
7 + 10x - x - x
7 + 8x
9. 18 - (-6x) - 3 + 8x
18 + 6x - 3 + 8x
18 - 3 + 6x + 8x
15 + 14x
9.5m questions
12.2m answers