Question

Let X = {1, 2, 3, 4, 5, 6}. If n represent any member of X, express the following as sets:
n + 5 = 8

Answer 1

Let B = {x | x ∈ X and x + 5 = 8}

Here, B = {3}

As x = 3 ∈ X and 3 + 5 = 8 and there is no other element belonging to X such that x + 5 = 8.