Answer:
8x-12
Step-by-step explanation:
You would first do the numbers inside the parenthesis, but since they aren't like terms, you don't need the parenthesis. The expression would be: 6x-3+2x-9. Then you add and subtract the like terms. 6x+2x=8x and -3-9=-12. Then the expression would be 8x-12.
