Solve: 9x - 7 ≤ 28 + 4x; x ∈ W.

Solve: -5 (x + 4) > 30; x ∈ Z.

Solve: -3 + x < 2, x ∈ N.

Solve and graph the solution set on a number line.

x - 5 < - 2; x ∈ N