Question

Rodrigo practiced playing 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 during the second week. How much time did rodrigo spend practicing during the 3rd week? use the numbers and symbols to write an equation that represents the problem. Then solve the equation. Symbols may be used more than once.

Answer 1

We must write step by step the problem data:
 Total hours: 15 1/3
 Week 1: 6 1/4
 Week 2: 4 2/3
 Week 3: x
 Let
 x: number of practice hours in week 3.
 We write the following equation:
 (6 1/4) + (4 2/3) + x = 15 1/3
 Clearing x:
 x = (15 1/3) - (6 1/4) - (4 2/3)
 x = 4.416666667
 answer:
 Rodrigo spend practicing during week 3:
 4.416666667 hours