SOLUTION: A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell      Log On


   

Question 226031: A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell a total fo 431 boxes of cookies, how many did they sell each week? Please show me how to set up this problem. Thank you very much.
Cheyenne
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x="first week sales"

"the girls sold 5 more boxes the second week" ___ x + 5

"they doubled the sales of the second week for the third week" ___ 2(x + 5) = 2x + 10

"a total fo 431 boxes of cookies" ___ x + x + 5 + 2x + 10 = 431

4x + 15 = 431