what you want to do here is use PEMDAS.
first work out the problems in the parenthesis. 24-3=21 and 9-2=7, the rewrite as, 8+2(21)/7.
Next multiply 2 and 21 to get 42, then it should be 8+42/7. divide 42 and 7 to get 6. and the last step is to add the remaining numbers, 8+6. Your answer is 14