Let g be the number of green cars, r be the number of red cars, and p be the number of purple cars.

We know that g + r + p = 315, r = p + 6, and g = 4r

Substitute the second equation into the third equation to get: g = 4r = 4(p + 6) = 4p + 24

Now substitute the equations that express g and r in terms of p in the equation for the total number of cars: 4p + 24 + p + 6 + p = 315

Now combine like terms to get 6p + 30 = 312

Now subtract 30 from both sides to get 6p = 282

Now divide both sides by 6 to get p = 47

# Answer

47
<|im_start|>system
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<|im_start|>user
Jason is counting the number of cars that drive by his window. He counted four times as many green cars as red cars, and 6 more red cars than purple cars. If he counted 312 cars total, how many of them were purple?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
47
Jason is counting the number of cars that drive by his window. He counted four times as many green cars as red cars, and 6 more red cars than purple cars. If he counted 312 cars total, how many of them were purple?
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