−px+r=−8x − 2, x=?
now i have to do this problem, and i dont know how, ?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expressions 4s +9s represents the total number of items that will be displayed on s shelves. simplify this expression

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals