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The number of video games in Anson's collection is 5x.
The total number of video games is x + 5x, which is equal to 6x.
Since the total number of video games is no more than 72, we can write the inequality:
6x ≤ 72
To find the solution set for x, we divide both sides of the inequality by 6:
x ≤ 12
Therefore, the solution set for x, the number of video games in Mark’s collection, is x ≤ 12.