Solution
Expression : (6x - 5) = (4x + 7)
=> $$6x-4x=7+5$$
=> $$2x=12$$
=> $$x=\frac{12}{2}=6$$
$$\therefore (x+1)^3=(6+1)^3$$
= $$(7)^3=343$$
=> Ans - (D)
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