According to an answer from another and a bit of my own research;
Using PEMDAS, start with the parenthesis. 6 minus 3 is 3, 5 plus 5 is 10. 3 minus 10 is negative 7. Now that you have finished the parenthesis, do negative 7 divided by 2. Then you get negative 3.5 and to fact check this, do negative 3.5 and multiply it by 2 to get negative 7. Just listen to the order of PEMDAS and everything will be fine.
Hope this helps you out. Feel free to ask for more information and I will offer you more support/help on your problem. <3
