Help please!

Question

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 of 431 boxes of cookies, how many did they sell each week?

Answer 1

Say, first week sold = x boxes

Second week sold = x+5 boxes

Third week sold = 2(x+5)

 

x+x+5+2x+10=431

x=104

She sold

First week=104

Second week=109

Third week =218