# Factorials!

Number Theory Level 2

Solve for $$x$$: $\large \dfrac{7!}{2! (3! - 1)} = \dfrac{(3x)!}{(x+3)!}$



Notation: $$!$$ denotes the factorial function. For example, $$8! = 1\times2\times3\times\cdots\times8$$.

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