It's 9 I checked by typing it exactly as shown in op's post 6÷2(1+2)= i.e. no spaces into several calculators including calc app on phone. They all came back with 9. The issue with people applying pemdas etc is they are taking each letter in turn which isn't what they acronym stands for. It really needs to be written as PE MD AS and the grouped letters are carried out left to right if they BOTH appear in the equation.