7-111. write the following number trick as an expression in two ways one with parentheses and one without.

Ok so basically there are many solutions here but I chose this one because I felt it was a good choice for this specific topic, 3(x+12) and can also be written as 3x+36. Hope this helped, do note that there can be many solutions and that I just picked one. If you have any questions feel free to ask!

There are 15 rings on the laddey