# Math Help - Combinations

1. ## Combinations

How do I solve for x?

C(x, 7) = C(x, 2)

Thanks!

2. $\left\{ \begin{gathered}
\binom{x}{7} = \binom{x}{2} \hfill \\
\binom{n}{k} = \binom{n}{n-k} \hfill \\
\end{gathered} \right.\, \Rightarrow \,2 = x - 7$

3. Do you mind walking me through it step by step? Thanks.

4. Originally Posted by patrickyou
Do you mind walking me through it step by step? Thanks.
Yes I do mind.