It is d it took me a while to read but it’s D
OF stands for multiplication so you will do 3/5 times b and then you have 7 less than that so you subtract 7 which equals A
3/5b-7=a
Soon his study ivory stride was heard as to and fro he paced and his old rounds upon planks so familiar to his tread that they were all over dented like geological stones with the peculiar mark
