Question 1060203
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Emily drove 240 miles to see her parents for Thanksgiving. On the return trip, she drove 20 mph slower due to bad weather, 
so she made the return trip in 2 hours more time. What was her speed on the way to her parents' home.

I am just confused on how to find the equation for the problem, once I have the equation I can solve the problem.
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The equation is

{{{240/(r-20) - 240/r}}} = 2.

where "r" is the speed on the way "to there", (r-20) is the speed on the way back.

{{{240/r}}} is the time to get "there".

{{{240/(r-20)}}} is the time on the way back.
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