PLS HELP ME I’VE ASKED THIS TWICE AND NOBODY HAD ANSWER THIS IS REALLY EASY TO DO

I HAVE THE ANSWER I JUST NEED TO SHOW THE WORK. PLS HELP MEEEE!!!

The answer is x = 9

PLS HELP ME IVE ASKED THIS TWICE AND NOBODY HAD ANSWER THIS IS REALLY EASY TO DO I HAVE THE ANSWER I JUST NEED TO SHOW THE WORK PLS HELP MEEEE The answer is x 9 class=