Verified Answer :

1 way
\(\frac{8}{64} = \frac{2}{x} \\ \\ \frac{8:4}{64:4} = \frac{2}{x} \\ \\ \frac{2}{16} = \frac{2}{x}\)    ⇔  x = 16
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2.way
\(\frac{8}{64} = \frac{2}{x}\)
We multiply the cross

\(8x = 2 * 64 8x = 128 x = 16\)

8 over 64 is equal to 2 over x...cross multipy and that should give you 128=8x...now just divide 128 by 8 to find x...x=16