Respuesta :

Answer:

[tex]f(x) = 30 - 5x \\ f(x) = 0 \\ 30 - 5x = 0 \\ 30 = 5x \\ 5x = 30 \\ x = \frac{30}{5} \\ \purple{\boxed{ \red{x = 6}}}[/tex]

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