Okay so
I5/6 x +3I -2=5
5/6 would mean that you would have to multiple.
5 x 3 and 6 x 3 would equal up to 15/18.
I15/18I -2=5
You would need to divide 18 to 15 and you get 1.2.
Then subtract 2.
You will get -0.8.
After use the recipical and you get 0.8.
After subtract by 3 and you get 5.