To solve the equation \( 2f5 - 85 + 2f = 8 \), we first need to clarify the expression. It appears there might be a typographical issue with "f5". Assuming it means \( f \) multiplied by \( 5 \), we will rewrite the equation as follows:
\[ 2(5f) - 85 + 2f = 8 \]
This simplifies to:
\[ 10f - 85 + 2f = 8 \]
Now, combine like terms:
\[ (10f + 2f) - 85 = 8 \]
This gives us:
\[ 12f - 85 = 8 \]
Next, isolate the term involving \( f \) by adding \( 85 \) to both sides:
\[ 12f = 8 + 85 \] \[ 12f = 93 \]
Now, divide both sides by \( 12 \) to solve for \( f \):
\[ f = \frac{93}{12} \]
To simplify \( \frac{93}{12} \):
- Both numbers can be divided by \( 3 \): \[ f = \frac{31}{4} \]
Thus, the solution to the equation is:
\[ f = 31/4 \]
Since \( \frac{31}{4} \) equals \( 7.75 \), none of the provided options (83, \( \frac{8}{3} \), 166, \( \frac{16}{6} \), 12, 4) seem to match with \( 7.75 \).
So the final answer is \( f = \frac{31}{4} \) which is not listed in the options provided. If the expression was intended to have a different meaning, please clarify for further assistance.