I think they were trying to find z. The weird thing is that they made the equation equal to the other side. You can’t solve anything if they are the exact same, it’s like solving x=x. And you can’t solve an expression so I have no clue what they’re doing. The big long x s looking thing has something to do with calculus which I don’t know but it still doesn’t make any sense.
Because 0’s are horrible during averaging for instance if you have 7 100’s and a single 0 you divide 100 by 8 and subtract that from 100 witch leaves you with 87.5 a reminder to all of you to turn in ALL of your assignments no matter how bad they actually are even 701 In This case brings it up from 87.5 to 87.625 or 87.6 a whole tenth of a point better.
