Two friends rent an apartment, where one person pays *3 times* of what the other person pays.
This can be shown as, where x is equal to the pay of what the other person pays:
Again, one friend will pay 3 times what one person pays.
3x + x = 850
Which can be simplified to:
4x = 850
Where 850 is the total rent to be payed.
To find out how much one person pays, you can solve the equation for x.
4x = 850
x = $212.5
