Respuesta :

Answer:

[tex] f(x) = \frac{20}{3} x[/tex]

Step-by-step explanation:

[tex]f(x) = \frac{20}{3} x \: ... (required function) \\

Plug \: x = 3 \\ f(3) = \frac{20}{3} \times 3 \\ f(3) = 20[/tex]

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