help! please look at the picture, the answer is needed quick the explanation doesn't matter. Thanks!

How do you do this geometry problem

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

The square root of 9x plus 7 plus the square rot of 2x equall to 7