Denise L. answered • 02/23/18

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It is easier to sketch these, but think of it this way.

Sam leaves at 8.0 and is traveling 2 mph -- so the distance he travels in X time is (X - 8.00)2mph

Dad leaves at 8.33 (20 minutes after 8) and travels at 12 mph,so his distance in X time is (X - 8.33)12 mph

You want to know when the times are the same...

So set the two equal to each other and solve for X.

After you do the work, remember that an answer like 8.4 means 4/10 of an hour after 8, or 24 minutes...