In a row of ten boys, when Rohit was shifted by two places towards the left, he became seventh from the left end. What was his earlier position from the right end of the row ?
A + B means A is the son of B; A - B means A is the wife of B; A x B means A is the brother of B; A ÷ B means A is the mother of B; and A = B means A is the sister of B. What does P x R ÷ Q mean ?