Question

se f (×)=3× -2 qual o valor de x para que f (x)=57 qual é a resposta ? a) 0 b)1 c)2 d)2 e)3 f)4

Answer 1

$f(x) = 3x - 2\\\\f(x)=57\\\\3x-2=57\\\\3x = 57 + 2\\\\3x=59\\\\x=19,7$