To solve the equation \( \frac{2f}{5} - \frac{8}{5} + 2f = 8 \), we can follow these steps:
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Clear the fractions by multiplying every term by 5:
\[ 5 \left( \frac{2f}{5} \right) - 5 \left( \frac{8}{5} \right) + 5 (2f) = 5(8) \]
This simplifies to:
\[ 2f - 8 + 10f = 40 \]
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Combine like terms on the left side:
\[ (2f + 10f) - 8 = 40 \] \[ 12f - 8 = 40 \]
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Isolate the term with \( f \) by adding 8 to both sides:
\[ 12f - 8 + 8 = 40 + 8 \] \[ 12f = 48 \]
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Solve for \( f \) by dividing both sides by 12:
\[ f = \frac{48}{12} \] \[ f = 4 \]
Thus, the solution to the equation is \( \boxed{4} \).