Solve the given inequation and graph the solution on the number line :
2y - 3 < y + 1 ≤ 4y + 7; y ∈ R
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Given 20 – 5x < 5(x + 8), find the smallest value of x, when
(i) x ∈ I
(ii) x ∈ W
(iii) x ∈ N