【Analysis and Solution】
Let the average score of the top 10 be $x$ points, then the average score of the top 7 is $(x+4)$ points, and the average score of the top 4 is $(x+7)$ points; the total score of the 5th, 6th, and 7th place is 28 points more than that of the 8th, 9th, and 10th place, which can be expressed as $[7(x+4)-4(x+7)]-[10 x-7(x+4)]=28$ points.
【Question 13】
In a city's archery competition, after ranking the scores, the average score of the top seven is 3 points less than the average score of the top four, and the average score of the top ten is 4 points less than the average score of the top seven. The total score of the 5th, 6th, and 7th place is $\qquad$ points more than the total score of the 8th, 9th, and 10th place.