Answer:
{3, 4, 5 }
Explanation:
solve the inequality
3x + 1 ≤ 16 ( subtract 1 from both sides )
3x ≤ 15 ( divide both sides by 3 )
x ≤ 5
from the set {3, 4, 5, 6, 7 }
the solution set is {3, 4, 5 }
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