Jill leaves a store traveling 7mph. After 8 hours John leaves the store traveling the same direction at 21 mph. How long until John catches up with and passes Jill?

Solution

Solution

Joh n^{'} s time : 4

Solution steps

Translate the problem into an equation:

7 (x + 8) = 21 x

Solve for

x, 7 (x + 8) = 21 x : x = 4

Joh n^{'} s time : 4

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