Rodrigo practice play the guitar 15 1/3 hours over the past 3 weeks. he practiced for 6 1/4 hours during the first week and 3 2/3 hours during the second week. how much time did rodrigo spend practicing during the third week? the equation that represents the problem is

a. x + 15 1/3 =6 1/2 + 3 2/3

b. 15 1/3 =x-6 1/4-3 2/3

c. x = 15 1/3 +6 1/2+ 32/3

d. 15 1/3 =6 1/4 +3 2/3 + x