Have u ever been this ugly lm*a

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Solve 17= -13 - 8x and show your work.

What is the value of x? enter your answer in the box. x =