15x - 40 = 23 - 8
this is the problem and i am totally lost

What values of data might affect the statistical measures of spread and center

The los angels ram scored 26, 30, 48, and 31 pts in their last four games. how many pts do they need to score in super bowl liii in order to have an exact mean average of 35 pts over five games. write and solve and equation. use x to represent the 5th game.

Can someone me out here and the tell me the greatest common factor