Adisplay that shows how the values in a data set are distributed

Will mark brainliest for correct answer! i have been on this problem for an hour and can't find the answer. i'm begging here! incase you cant read the instructions in the picture because of too much or too little lighting: note: enter your answer and show all the steps that you use to solve this problem in the space provided.write a list of steps that are needed to find the measure of b. provide all steps as clear as possible, !

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )

This question is hard for me to answer can you me. the question is find the value of x.