Question

Cody spent 27 hours practicing piano last week That is three times longer than his sister practiced. How many hours (h) did his sister practice

Answer 1

Time Cody's sister spent practicing x

Time spent by Cody is 3 times x = 27 hours

Express Cody time mathematically and solve for x

`\begin{gathered} 3* x=27 \\ 3x=27 \\ x=(27)/(3) \\ x=9\text{hours} \end{gathered}`

Since the time Cody's sister spent is x

Hence, Cody's sister spent 9 hours