This is an order of operations problem.
According to the order of operations, we perform operations in the following sequence
1. Any operations within parentheses (or brackets, braces, etc.) first
2. We evaluate any number containing an exponent
3. We perform multiplication
4. We perform division
5. We perform addition
6. We perform subtraction
* Multiplication and division rank equally, so work from left to right as you encounter these operations
* Addition and subtraction rank equally, so work from left to right as you encounter these operations
Using the above as a guide, we have the following:
9 - 3(2 + 6) ÷ 6 - 2 x 5
= 9 - 3(8) ÷ 6 - 2 x 5
= 9 - 24 ÷ 6 - 2 x 5
= 9 - 4 - 10
= 5 - 10
= -5
