Answer:
[tex] - 9 \times + 8x + 4x - 12 x\\ - x + 4 x- 12x \\ 3x - 12x \\ - 9x[/tex]
Step-by-step explanation:
Istart mo add sa left side, 1st step -9x+ 8x then the result is -1x or - x+4x-12x need to copy first the remaining term . second step -x + 4x the result is 3x - 12x need to copy the last term which is 12x. Last step add the remaining term 3x-12x the result is - 9x.