Question 317015
let the scouts sell x boxes in the second week
..
in the first week they sold 5 boxes more.
so in first week they sold x+5 boxes
..
in the third week they sold two times the number they sold in the second week.
so they sold 2(x+5) in the third week.
..
Sum of all boxes sold
x+(x+5)+2(x+5)=431
x+x+5+2x+10=431
4x+15=431
4x=431-15
4x=416
x= 416/4
x=104 boxes in the second week
..
first week = x+5
= 104+5=109 boxes
..
third week 2(x+5)
=2*(104+5)
=2*109
=218 boxes

CHECK
104+109+218=431



***no offense but u have it correct except that its the 2nd week that sells 5 more boxes and the first week=(x)=104, 2nd week=(x+5)=109, third week=(2(x+5))=218  ~~JBarnum~~