Rodrigo practiced playing the guitar 15 1/3 hours over the past 3 weeks. he practiced for 6 1/4 hours during the first week and 4 2/3 hours during the second week. how much time did rodrigo spend practicing the third week? use the numbers and symbols to write an equation that represents the problem. symbols may be used more than once or not at all. [ 15 1/3 ] [ 6 1/4 ] [4 2/3 ] [x (multiply)] [= (equals) ] [ + (add) ] solve the equation.