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18!+19!=x10!\dfrac{1}{{8!}} + \dfrac{1}{{9!}} = \dfrac{x}{{10!}}8!1+9!1=10!x
Find the value of xxx satisfying the equation above.
Notation: !!! denotes the factorial notation. For example, 8!=1×2×3×⋯×88! = 1\times2\times3\times\cdots\times8 8!=1×2×3×⋯×8.
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