When 5 is added to four times a certain number the result is not more than twice that number added to 19 what is the number.​

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The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

The parabola opens: y=√x-4 (principal square root) up down right left