The number of library books increased by 20% after it bought new books in May. The number increased by another 20% after someone donated 300 more books in June. Find the number of books in the library before it bought new books in May.

Please help I'm confused!!

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Which of the following equations is equivalent to x/3-6/x=1