SOLUTION: In the sequence of #'s x1, x2, x3, x4, x5 (all numbers are sub), each # after the first is twice the preceeding number. If x5 - x1 = 20, what is the value of x1?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: In the sequence of #'s x1, x2, x3, x4, x5 (all numbers are sub), each # after the first is twice the preceeding number. If x5 - x1 = 20, what is the value of x1?      Log On


   

Question 321690: In the sequence of #'s x1, x2, x3, x4, x5 (all numbers are sub), each # after the first is twice the preceeding number. If x5 - x1 = 20, what is the value of x1?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Since and , we can say .

Following this reasoning, we end up with





John