You have a total of 91 students in 2 classes, with drama having 19 more students. The formula for this is x+x+19=91. Combining like terms gives us 2x+19=91. Subtract both sides by 19, which gives us 72. Then divide by 2 which gives us 36. But, we are not done yet. you have the number of people in yearbook, but we still need to find out how many are in drama. to do that, just add 19 which gives us 55 students in drama. Hope this helps!
