+77 Brian and Rayan shared a bag of marbles. 1/6 of Brian's share was equal to 1/4 of Rayyan's marbles. Brian lost 42 of his marbles while Rayyan bought another 60 marbles. They then had an equal number of marbles.
(a) How many marbles did Brian have at first?
(b) What was the total number of marbles they had in the end?
