If \( ^nC_2 + ^nC_3 = ^6C_3 \) and \( ^nC_x = ^nC_3, x \neq 3 \), then the value of \( x \) is equal to:
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Pascal's Triangle is your best friend for small values. If you forget the formula, just remember that any entry in the triangle is the sum of the two entries directly above it.