How do I solve - 3x = 9

1) 92,88,100,169,76,72,67,10,115,73,111,59 Outliers; 2) 20,52,86,80,44,49,57,41,44,55 Outliers; 3) 4,11.6,50,23,20.1,19,29,12.7,8,23,57.5, Outliers; 4) 67, 7, 79, 65,52, 71, 73, 94,69 Outliers; 5) 18,68,15,45,46,36,72, 34,42,38 Outliers; 6) 77,51.

What does step mean I'm mathematics

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