Find the value of 5 (3)

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Just tell me how to set up the equation.

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 .