<PRE><B>Question 367647</B>
Joel spent  15hrs watching movies. The space adventures were 1.5hrs long and the mysteries were 2hrs long. He watched twice as many space adventures as mysteries. How much time did he spend watching space adventures?

Let 1.5s = time spent on watching space adventures
      2m = time spent on watching mysteries

Equation 1
1.5s + 2m = 15

Equation 2
       2m = s
Substitute 2m = s in equation 1

1.5s + s = 15
    2.5s = 15
       s = 6
    1.5s = 1.5(6) = 9

Joel spent 9 hours watching space adventures


       


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