How are common denominators are different and alike

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

What value of x is in the solution set of –5x – 15 > 10 + 20x?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.